text: /**
   * Sheetbase Modifications
   * This file was modified by Sheetbase.
   * See: <sheetbase>...</sheetbase>
   * 
   */
  /*<sheetbase>*/var moduleExports = this;/*</sheetbase>*/
  /*!
   * https://github.com/paulmillr/es6-shim
   * @license es6-shim Copyright 2013-2016 by Paul Miller (http://paulmillr.com)
   *   and contributors,  MIT License
   * es6-shim: v0.35.3
   * see https://github.com/paulmillr/es6-shim/blob/0.35.3/LICENSE
   * Details and documentation:
   * https://github.com/paulmillr/es6-shim/
   */
  
  // UMD (Universal Module Definition)
  // see https://github.com/umdjs/umd/blob/master/returnExports.js
  (function (root, factory) {
    /*global define, module, exports */
    if (typeof define === 'function' && define.amd) {
      // AMD. Register as an anonymous module.
      define(factory);
    } else if (typeof exports === 'object') {
      // Node. Does not work with strict CommonJS, but
      // only CommonJS-like environments that support module.exports,
      // like Node.
      module.exports = factory();
    } else {
      // Browser globals (root is window)
      root.returnExports = factory();
    }
  }(this, function () {
    'use strict';
  
    var _apply = Function.call.bind(Function.apply);
    var _call = Function.call.bind(Function.call);
    var isArray = Array.isArray;
    var keys = Object.keys;
  
    var not = function notThunker(func) {
      return function notThunk() {
        return !_apply(func, this, arguments);
      };
    };
    var throwsError = function (func) {
      try {
        func();
        return false;
      } catch (e) {
        return true;
      }
    };
    var valueOrFalseIfThrows = function valueOrFalseIfThrows(func) {
      try {
        return func();
      } catch (e) {
        return false;
      }
    };
  
    var isCallableWithoutNew = not(throwsError);
    var arePropertyDescriptorsSupported = function () {
      // if Object.defineProperty exists but throws, it's IE 8
      return !throwsError(function () {
        Object.defineProperty({}, 'x', { get: function () { } }); // eslint-disable-line getter-return
      });
    };
    var supportsDescriptors = !!Object.defineProperty && arePropertyDescriptorsSupported();
    var functionsHaveNames = (function foo() {}).name === 'foo'; // eslint-disable-line no-extra-parens
  
    var _forEach = Function.call.bind(Array.prototype.forEach);
    var _reduce = Function.call.bind(Array.prototype.reduce);
    var _filter = Function.call.bind(Array.prototype.filter);
    var _some = Function.call.bind(Array.prototype.some);
  
    var defineProperty = function (object, name, value, force) {
      if (!force && name in object) { return; }
      if (supportsDescriptors) {
        Object.defineProperty(object, name, {
          configurable: true,
          enumerable: false,
          writable: true,
          value: value
        });
      } else {
        object[name] = value;
      }
    };
  
    // Define configurable, writable and non-enumerable props
    // if they don’t exist.
    var defineProperties = function (object, map, forceOverride) {
      _forEach(keys(map), function (name) {
        var method = map[name];
        defineProperty(object, name, method, !!forceOverride);
      });
    };
  
    var _toString = Function.call.bind(Object.prototype.toString);
    var isCallable = typeof /abc/ === 'function' ? function IsCallableSlow(x) {
      // Some old browsers (IE, FF) say that typeof /abc/ === 'function'
      return typeof x === 'function' && _toString(x) === '[object Function]';
    } : function IsCallableFast(x) { return typeof x === 'function'; };
  
    var Value = {
      getter: function (object, name, getter) {
        if (!supportsDescriptors) {
          throw new TypeError('getters require true ES5 support');
        }
        Object.defineProperty(object, name, {
          configurable: true,
          enumerable: false,
          get: getter
        });
      },
      proxy: function (originalObject, key, targetObject) {
        if (!supportsDescriptors) {
          throw new TypeError('getters require true ES5 support');
        }
        var originalDescriptor = Object.getOwnPropertyDescriptor(originalObject, key);
        Object.defineProperty(targetObject, key, {
          configurable: originalDescriptor.configurable,
          enumerable: originalDescriptor.enumerable,
          get: function getKey() { return originalObject[key]; },
          set: function setKey(value) { originalObject[key] = value; }
        });
      },
      redefine: function (object, property, newValue) {
        if (supportsDescriptors) {
          var descriptor = Object.getOwnPropertyDescriptor(object, property);
          descriptor.value = newValue;
          Object.defineProperty(object, property, descriptor);
        } else {
          object[property] = newValue;
        }
      },
      defineByDescriptor: function (object, property, descriptor) {
        if (supportsDescriptors) {
          Object.defineProperty(object, property, descriptor);
        } else if ('value' in descriptor) {
          object[property] = descriptor.value;
        }
      },
      preserveToString: function (target, source) {
        if (source && isCallable(source.toString)) {
          defineProperty(target, 'toString', source.toString.bind(source), true);
        }
      }
    };
  
    // Simple shim for Object.create on ES3 browsers
    // (unlike real shim, no attempt to support `prototype === null`)
    var create = Object.create || function (prototype, properties) {
      var Prototype = function Prototype() {};
      Prototype.prototype = prototype;
      var object = new Prototype();
      if (typeof properties !== 'undefined') {
        keys(properties).forEach(function (key) {
          Value.defineByDescriptor(object, key, properties[key]);
        });
      }
      return object;
    };
  
    var supportsSubclassing = function (C, f) {
      if (!Object.setPrototypeOf) { return false; /* skip test on IE < 11 */ }
      return valueOrFalseIfThrows(function () {
        var Sub = function Subclass(arg) {
          var o = new C(arg);
          Object.setPrototypeOf(o, Subclass.prototype);
          return o;
        };
        Object.setPrototypeOf(Sub, C);
        Sub.prototype = create(C.prototype, {
          constructor: { value: Sub }
        });
        return f(Sub);
      });
    };
  
    var getGlobal = function () {
      /* global self, window, global */
      // the only reliable means to get the global object is
      // `Function('return this')()`
      // However, this causes CSP violations in Chrome apps.
      if (typeof self !== 'undefined') { return self; }
      if (typeof window !== 'undefined') { return window; }
      if (typeof global !== 'undefined') { return global; }
      /*<sheetbase>*/if (typeof moduleExports !== 'undefined') { return moduleExports; };/*</sheetbase>*/
      throw new Error('unable to locate global object');
    };
  
    var globals = getGlobal();
    var globalIsFinite = globals.isFinite;
    var _indexOf = Function.call.bind(String.prototype.indexOf);
    var _arrayIndexOfApply = Function.apply.bind(Array.prototype.indexOf);
    var _concat = Function.call.bind(Array.prototype.concat);
    // var _sort = Function.call.bind(Array.prototype.sort);
    var _strSlice = Function.call.bind(String.prototype.slice);
    var _push = Function.call.bind(Array.prototype.push);
    var _pushApply = Function.apply.bind(Array.prototype.push);
    var _shift = Function.call.bind(Array.prototype.shift);
    var _max = Math.max;
    var _min = Math.min;
    var _floor = Math.floor;
    var _abs = Math.abs;
    var _exp = Math.exp;
    var _log = Math.log;
    var _sqrt = Math.sqrt;
    var _hasOwnProperty = Function.call.bind(Object.prototype.hasOwnProperty);
    var ArrayIterator; // make our implementation private
    var noop = function () {};
  
    var OrigMap = globals.Map;
    var origMapDelete = OrigMap && OrigMap.prototype['delete'];
    var origMapGet = OrigMap && OrigMap.prototype.get;
    var origMapHas = OrigMap && OrigMap.prototype.has;
    var origMapSet = OrigMap && OrigMap.prototype.set;
  
    var Symbol = globals.Symbol || {};
    var symbolSpecies = Symbol.species || '@@species';
  
    var numberIsNaN = Number.isNaN || function isNaN(value) {
      // NaN !== NaN, but they are identical.
      // NaNs are the only non-reflexive value, i.e., if x !== x,
      // then x is NaN.
      // isNaN is broken: it converts its argument to number, so
      // isNaN('foo') => true
      return value !== value;
    };
    var numberIsFinite = Number.isFinite || function isFinite(value) {
      return typeof value === 'number' && globalIsFinite(value);
    };
    var _sign = isCallable(Math.sign) ? Math.sign : function sign(value) {
      var number = Number(value);
      if (number === 0) { return number; }
      if (numberIsNaN(number)) { return number; }
      return number < 0 ? -1 : 1;
    };
    var _log1p = function log1p(value) {
      var x = Number(value);
      if (x < -1 || numberIsNaN(x)) { return NaN; }
      if (x === 0 || x === Infinity) { return x; }
      if (x === -1) { return -Infinity; }
  
      return (1 + x) - 1 === 0 ? x : x * (_log(1 + x) / ((1 + x) - 1));
    };
  
    // taken directly from https://github.com/ljharb/is-arguments/blob/master/index.js
    // can be replaced with require('is-arguments') if we ever use a build process instead
    var isStandardArguments = function isArguments(value) {
      return _toString(value) === '[object Arguments]';
    };
    var isLegacyArguments = function isArguments(value) {
      return value !== null &&
        typeof value === 'object' &&
        typeof value.length === 'number' &&
        value.length >= 0 &&
        _toString(value) !== '[object Array]' &&
        _toString(value.callee) === '[object Function]';
    };
    var isArguments = isStandardArguments(arguments) ? isStandardArguments : isLegacyArguments;
  
    var Type = {
      primitive: function (x) { return x === null || (typeof x !== 'function' && typeof x !== 'object'); },
      string: function (x) { return _toString(x) === '[object String]'; },
      regex: function (x) { return _toString(x) === '[object RegExp]'; },
      symbol: function (x) {
        return typeof globals.Symbol === 'function' && typeof x === 'symbol';
      }
    };
  
    var overrideNative = function overrideNative(object, property, replacement) {
      var original = object[property];
      defineProperty(object, property, replacement, true);
      Value.preserveToString(object[property], original);
    };
  
    // eslint-disable-next-line no-restricted-properties
    var hasSymbols = typeof Symbol === 'function' && typeof Symbol['for'] === 'function' && Type.symbol(Symbol());
  
    // This is a private name in the es6 spec, equal to '[Symbol.iterator]'
    // we're going to use an arbitrary _-prefixed name to make our shims
    // work properly with each other, even though we don't have full Iterator
    // support.  That is, `Array.from(map.keys())` will work, but we don't
    // pretend to export a "real" Iterator interface.
    var $iterator$ = Type.symbol(Symbol.iterator) ? Symbol.iterator : '_es6-shim iterator_';
    // Firefox ships a partial implementation using the name @@iterator.
    // https://bugzilla.mozilla.org/show_bug.cgi?id=907077#c14
    // So use that name if we detect it.
    if (globals.Set && typeof new globals.Set()['@@iterator'] === 'function') {
      $iterator$ = '@@iterator';
    }
  
    // Reflect
    if (!globals.Reflect) {
      defineProperty(globals, 'Reflect', {}, true);
    }
    var Reflect = globals.Reflect;
  
    var $String = String;
  
    /* global document */
    var domAll = (typeof document === 'undefined' || !document) ? null : document.all;
    /* jshint eqnull:true */
    var isNullOrUndefined = domAll == null ? function isNullOrUndefined(x) {
      /* jshint eqnull:true */
      return x == null;
    } : function isNullOrUndefinedAndNotDocumentAll(x) {
      /* jshint eqnull:true */
      return x == null && x !== domAll;
    };
  
    var ES = {
      // http://www.ecma-international.org/ecma-262/6.0/#sec-call
      Call: function Call(F, V) {
        var args = arguments.length > 2 ? arguments[2] : [];
        if (!ES.IsCallable(F)) {
          throw new TypeError(F + ' is not a function');
        }
        return _apply(F, V, args);
      },
  
      RequireObjectCoercible: function (x, optMessage) {
        if (isNullOrUndefined(x)) {
          throw new TypeError(optMessage || 'Cannot call method on ' + x);
        }
        return x;
      },
  
      // This might miss the "(non-standard exotic and does not implement
      // [[Call]])" case from
      // http://www.ecma-international.org/ecma-262/6.0/#sec-typeof-operator-runtime-semantics-evaluation
      // but we can't find any evidence these objects exist in practice.
      // If we find some in the future, you could test `Object(x) === x`,
      // which is reliable according to
      // http://www.ecma-international.org/ecma-262/6.0/#sec-toobject
      // but is not well optimized by runtimes and creates an object
      // whenever it returns false, and thus is very slow.
      TypeIsObject: function (x) {
        if (x === void 0 || x === null || x === true || x === false) {
          return false;
        }
        return typeof x === 'function' || typeof x === 'object' || x === domAll;
      },
  
      ToObject: function (o, optMessage) {
        return Object(ES.RequireObjectCoercible(o, optMessage));
      },
  
      IsCallable: isCallable,
  
      IsConstructor: function (x) {
        // We can't tell callables from constructors in ES5
        return ES.IsCallable(x);
      },
  
      ToInt32: function (x) {
        return ES.ToNumber(x) >> 0;
      },
  
      ToUint32: function (x) {
        return ES.ToNumber(x) >>> 0;
      },
  
      ToNumber: function (value) {
        if (_toString(value) === '[object Symbol]') {
          throw new TypeError('Cannot convert a Symbol value to a number');
        }
        return +value;
      },
  
      ToInteger: function (value) {
        var number = ES.ToNumber(value);
        if (numberIsNaN(number)) { return 0; }
        if (number === 0 || !numberIsFinite(number)) { return number; }
        return (number > 0 ? 1 : -1) * _floor(_abs(number));
      },
  
      ToLength: function (value) {
        var len = ES.ToInteger(value);
        if (len <= 0) { return 0; } // includes converting -0 to +0
        if (len > Number.MAX_SAFE_INTEGER) { return Number.MAX_SAFE_INTEGER; }
        return len;
      },
  
      SameValue: function (a, b) {
        if (a === b) {
          // 0 === -0, but they are not identical.
          if (a === 0) { return 1 / a === 1 / b; }
          return true;
        }
        return numberIsNaN(a) && numberIsNaN(b);
      },
  
      SameValueZero: function (a, b) {
        // same as SameValue except for SameValueZero(+0, -0) == true
        return (a === b) || (numberIsNaN(a) && numberIsNaN(b));
      },
  
      IsIterable: function (o) {
        return ES.TypeIsObject(o) && (typeof o[$iterator$] !== 'undefined' || isArguments(o));
      },
  
      GetIterator: function (o) {
        if (isArguments(o)) {
          // special case support for `arguments`
          return new ArrayIterator(o, 'value');
        }
        var itFn = ES.GetMethod(o, $iterator$);
        if (!ES.IsCallable(itFn)) {
          // Better diagnostics if itFn is null or undefined
          throw new TypeError('value is not an iterable');
        }
        var it = ES.Call(itFn, o);
        if (!ES.TypeIsObject(it)) {
          throw new TypeError('bad iterator');
        }
        return it;
      },
  
      GetMethod: function (o, p) {
        var func = ES.ToObject(o)[p];
        if (isNullOrUndefined(func)) {
          return void 0;
        }
        if (!ES.IsCallable(func)) {
          throw new TypeError('Method not callable: ' + p);
        }
        return func;
      },
  
      IteratorComplete: function (iterResult) {
        return !!iterResult.done;
      },
  
      IteratorClose: function (iterator, completionIsThrow) {
        var returnMethod = ES.GetMethod(iterator, 'return');
        if (returnMethod === void 0) {
          return;
        }
        var innerResult, innerException;
        try {
          innerResult = ES.Call(returnMethod, iterator);
        } catch (e) {
          innerException = e;
        }
        if (completionIsThrow) {
          return;
        }
        if (innerException) {
          throw innerException;
        }
        if (!ES.TypeIsObject(innerResult)) {
          throw new TypeError("Iterator's return method returned a non-object.");
        }
      },
  
      IteratorNext: function (it) {
        var result = arguments.length > 1 ? it.next(arguments[1]) : it.next();
        if (!ES.TypeIsObject(result)) {
          throw new TypeError('bad iterator');
        }
        return result;
      },
  
      IteratorStep: function (it) {
        var result = ES.IteratorNext(it);
        var done = ES.IteratorComplete(result);
        return done ? false : result;
      },
  
      Construct: function (C, args, newTarget, isES6internal) {
        var target = typeof newTarget === 'undefined' ? C : newTarget;
  
        if (!isES6internal && Reflect.construct) {
          // Try to use Reflect.construct if available
          return Reflect.construct(C, args, target);
        }
        // OK, we have to fake it.  This will only work if the
        // C.[[ConstructorKind]] == "base" -- but that's the only
        // kind we can make in ES5 code anyway.
  
        // OrdinaryCreateFromConstructor(target, "%ObjectPrototype%")
        var proto = target.prototype;
        if (!ES.TypeIsObject(proto)) {
          proto = Object.prototype;
        }
        var obj = create(proto);
        // Call the constructor.
        var result = ES.Call(C, obj, args);
        return ES.TypeIsObject(result) ? result : obj;
      },
  
      SpeciesConstructor: function (O, defaultConstructor) {
        var C = O.constructor;
        if (C === void 0) {
          return defaultConstructor;
        }
        if (!ES.TypeIsObject(C)) {
          throw new TypeError('Bad constructor');
        }
        var S = C[symbolSpecies];
        if (isNullOrUndefined(S)) {
          return defaultConstructor;
        }
        if (!ES.IsConstructor(S)) {
          throw new TypeError('Bad @@species');
        }
        return S;
      },
  
      CreateHTML: function (string, tag, attribute, value) {
        var S = ES.ToString(string);
        var p1 = '<' + tag;
        if (attribute !== '') {
          var V = ES.ToString(value);
          var escapedV = V.replace(/"/g, '&quot;');
          p1 += ' ' + attribute + '="' + escapedV + '"';
        }
        var p2 = p1 + '>';
        var p3 = p2 + S;
        return p3 + '</' + tag + '>';
      },
  
      IsRegExp: function IsRegExp(argument) {
        if (!ES.TypeIsObject(argument)) {
          return false;
        }
        var isRegExp = argument[Symbol.match];
        if (typeof isRegExp !== 'undefined') {
          return !!isRegExp;
        }
        return Type.regex(argument);
      },
  
      ToString: function ToString(string) {
        return $String(string);
      }
    };
  
    // Well-known Symbol shims
    if (supportsDescriptors && hasSymbols) {
      var defineWellKnownSymbol = function defineWellKnownSymbol(name) {
        if (Type.symbol(Symbol[name])) {
          return Symbol[name];
        }
        // eslint-disable-next-line no-restricted-properties
        var sym = Symbol['for']('Symbol.' + name);
        Object.defineProperty(Symbol, name, {
          configurable: false,
          enumerable: false,
          writable: false,
          value: sym
        });
        return sym;
      };
      if (!Type.symbol(Symbol.search)) {
        var symbolSearch = defineWellKnownSymbol('search');
        var originalSearch = String.prototype.search;
        defineProperty(RegExp.prototype, symbolSearch, function search(string) {
          return ES.Call(originalSearch, string, [this]);
        });
        var searchShim = function search(regexp) {
          var O = ES.RequireObjectCoercible(this);
          if (!isNullOrUndefined(regexp)) {
            var searcher = ES.GetMethod(regexp, symbolSearch);
            if (typeof searcher !== 'undefined') {
              return ES.Call(searcher, regexp, [O]);
            }
          }
          return ES.Call(originalSearch, O, [ES.ToString(regexp)]);
        };
        overrideNative(String.prototype, 'search', searchShim);
      }
      if (!Type.symbol(Symbol.replace)) {
        var symbolReplace = defineWellKnownSymbol('replace');
        var originalReplace = String.prototype.replace;
        defineProperty(RegExp.prototype, symbolReplace, function replace(string, replaceValue) {
          return ES.Call(originalReplace, string, [this, replaceValue]);
        });
        var replaceShim = function replace(searchValue, replaceValue) {
          var O = ES.RequireObjectCoercible(this);
          if (!isNullOrUndefined(searchValue)) {
            var replacer = ES.GetMethod(searchValue, symbolReplace);
            if (typeof replacer !== 'undefined') {
              return ES.Call(replacer, searchValue, [O, replaceValue]);
            }
          }
          return ES.Call(originalReplace, O, [ES.ToString(searchValue), replaceValue]);
        };
        overrideNative(String.prototype, 'replace', replaceShim);
      }
      if (!Type.symbol(Symbol.split)) {
        var symbolSplit = defineWellKnownSymbol('split');
        var originalSplit = String.prototype.split;
        defineProperty(RegExp.prototype, symbolSplit, function split(string, limit) {
          return ES.Call(originalSplit, string, [this, limit]);
        });
        var splitShim = function split(separator, limit) {
          var O = ES.RequireObjectCoercible(this);
          if (!isNullOrUndefined(separator)) {
            var splitter = ES.GetMethod(separator, symbolSplit);
            if (typeof splitter !== 'undefined') {
              return ES.Call(splitter, separator, [O, limit]);
            }
          }
          return ES.Call(originalSplit, O, [ES.ToString(separator), limit]);
        };
        overrideNative(String.prototype, 'split', splitShim);
      }
      var symbolMatchExists = Type.symbol(Symbol.match);
      var stringMatchIgnoresSymbolMatch = symbolMatchExists && (function () {
        // Firefox 41, through Nightly 45 has Symbol.match, but String#match ignores it.
        // Firefox 40 and below have Symbol.match but String#match works fine.
        var o = {};
        o[Symbol.match] = function () { return 42; };
        return 'a'.match(o) !== 42;
      }());
      if (!symbolMatchExists || stringMatchIgnoresSymbolMatch) {
        var symbolMatch = defineWellKnownSymbol('match');
  
        var originalMatch = String.prototype.match;
        defineProperty(RegExp.prototype, symbolMatch, function match(string) {
          return ES.Call(originalMatch, string, [this]);
        });
  
        var matchShim = function match(regexp) {
          var O = ES.RequireObjectCoercible(this);
          if (!isNullOrUndefined(regexp)) {
            var matcher = ES.GetMethod(regexp, symbolMatch);
            if (typeof matcher !== 'undefined') {
              return ES.Call(matcher, regexp, [O]);
            }
          }
          return ES.Call(originalMatch, O, [ES.ToString(regexp)]);
        };
        overrideNative(String.prototype, 'match', matchShim);
      }
    }
  
    var wrapConstructor = function wrapConstructor(original, replacement, keysToSkip) {
      Value.preserveToString(replacement, original);
      if (Object.setPrototypeOf) {
        // sets up proper prototype chain where possible
        Object.setPrototypeOf(original, replacement);
      }
      if (supportsDescriptors) {
        _forEach(Object.getOwnPropertyNames(original), function (key) {
          if (key in noop || keysToSkip[key]) { return; }
          Value.proxy(original, key, replacement);
        });
      } else {
        _forEach(Object.keys(original), function (key) {
          if (key in noop || keysToSkip[key]) { return; }
          replacement[key] = original[key];
        });
      }
      replacement.prototype = original.prototype;
      Value.redefine(original.prototype, 'constructor', replacement);
    };
  
    var defaultSpeciesGetter = function () { return this; };
    var addDefaultSpecies = function (C) {
      if (supportsDescriptors && !_hasOwnProperty(C, symbolSpecies)) {
        Value.getter(C, symbolSpecies, defaultSpeciesGetter);
      }
    };
  
    var addIterator = function (prototype, impl) {
      var implementation = impl || function iterator() { return this; };
      defineProperty(prototype, $iterator$, implementation);
      if (!prototype[$iterator$] && Type.symbol($iterator$)) {
        // implementations are buggy when $iterator$ is a Symbol
        prototype[$iterator$] = implementation;
      }
    };
  
    var createDataProperty = function createDataProperty(object, name, value) {
      if (supportsDescriptors) {
        Object.defineProperty(object, name, {
          configurable: true,
          enumerable: true,
          writable: true,
          value: value
        });
      } else {
        object[name] = value;
      }
    };
    var createDataPropertyOrThrow = function createDataPropertyOrThrow(object, name, value) {
      createDataProperty(object, name, value);
      if (!ES.SameValue(object[name], value)) {
        throw new TypeError('property is nonconfigurable');
      }
    };
  
    var emulateES6construct = function (o, defaultNewTarget, defaultProto, slots) {
      // This is an es5 approximation to es6 construct semantics.  in es6,
      // 'new Foo' invokes Foo.[[Construct]] which (for almost all objects)
      // just sets the internal variable NewTarget (in es6 syntax `new.target`)
      // to Foo and then returns Foo().
  
      // Many ES6 object then have constructors of the form:
      // 1. If NewTarget is undefined, throw a TypeError exception
      // 2. Let xxx by OrdinaryCreateFromConstructor(NewTarget, yyy, zzz)
  
      // So we're going to emulate those first two steps.
      if (!ES.TypeIsObject(o)) {
        throw new TypeError('Constructor requires `new`: ' + defaultNewTarget.name);
      }
      var proto = defaultNewTarget.prototype;
      if (!ES.TypeIsObject(proto)) {
        proto = defaultProto;
      }
      var obj = create(proto);
      for (var name in slots) {
        if (_hasOwnProperty(slots, name)) {
          var value = slots[name];
          defineProperty(obj, name, value, true);
        }
      }
      return obj;
    };
  
    // Firefox 31 reports this function's length as 0
    // https://bugzilla.mozilla.org/show_bug.cgi?id=1062484
    if (String.fromCodePoint && String.fromCodePoint.length !== 1) {
      var originalFromCodePoint = String.fromCodePoint;
      overrideNative(String, 'fromCodePoint', function fromCodePoint(codePoints) {
        return ES.Call(originalFromCodePoint, this, arguments);
      });
    }
  
    var StringShims = {
      fromCodePoint: function fromCodePoint(codePoints) {
        var result = [];
        var next;
        for (var i = 0, length = arguments.length; i < length; i++) {
          next = Number(arguments[i]);
          if (!ES.SameValue(next, ES.ToInteger(next)) || next < 0 || next > 0x10FFFF) {
            throw new RangeError('Invalid code point ' + next);
          }
  
          if (next < 0x10000) {
            _push(result, String.fromCharCode(next));
          } else {
            next -= 0x10000;
            _push(result, String.fromCharCode((next >> 10) + 0xD800));
            _push(result, String.fromCharCode((next % 0x400) + 0xDC00));
          }
        }
        return result.join('');
      },
  
      raw: function raw(callSite) {
        var cooked = ES.ToObject(callSite, 'bad callSite');
        var rawString = ES.ToObject(cooked.raw, 'bad raw value');
        var len = rawString.length;
        var literalsegments = ES.ToLength(len);
        if (literalsegments <= 0) {
          return '';
        }
  
        var stringElements = [];
        var nextIndex = 0;
        var nextKey, next, nextSeg, nextSub;
        while (nextIndex < literalsegments) {
          nextKey = ES.ToString(nextIndex);
          nextSeg = ES.ToString(rawString[nextKey]);
          _push(stringElements, nextSeg);
          if (nextIndex + 1 >= literalsegments) {
            break;
          }
          next = nextIndex + 1 < arguments.length ? arguments[nextIndex + 1] : '';
          nextSub = ES.ToString(next);
          _push(stringElements, nextSub);
          nextIndex += 1;
        }
        return stringElements.join('');
      }
    };
    if (String.raw && String.raw({ raw: { 0: 'x', 1: 'y', length: 2 } }) !== 'xy') {
      // IE 11 TP has a broken String.raw implementation
      overrideNative(String, 'raw', StringShims.raw);
    }
    defineProperties(String, StringShims);
  
    // Fast repeat, uses the `Exponentiation by squaring` algorithm.
    // Perf: http://jsperf.com/string-repeat2/2
    var stringRepeat = function repeat(s, times) {
      if (times < 1) { return ''; }
      if (times % 2) { return repeat(s, times - 1) + s; }
      var half = repeat(s, times / 2);
      return half + half;
    };
    var stringMaxLength = Infinity;
  
    var StringPrototypeShims = {
      repeat: function repeat(times) {
        var thisStr = ES.ToString(ES.RequireObjectCoercible(this));
        var numTimes = ES.ToInteger(times);
        if (numTimes < 0 || numTimes >= stringMaxLength) {
          throw new RangeError('repeat count must be less than infinity and not overflow maximum string size');
        }
        return stringRepeat(thisStr, numTimes);
      },
  
      startsWith: function startsWith(searchString) {
        var S = ES.ToString(ES.RequireObjectCoercible(this));
        if (ES.IsRegExp(searchString)) {
          throw new TypeError('Cannot call method "startsWith" with a regex');
        }
        var searchStr = ES.ToString(searchString);
        var position;
        if (arguments.length > 1) {
          position = arguments[1];
        }
        var start = _max(ES.ToInteger(position), 0);
        return _strSlice(S, start, start + searchStr.length) === searchStr;
      },
  
      endsWith: function endsWith(searchString) {
        var S = ES.ToString(ES.RequireObjectCoercible(this));
        if (ES.IsRegExp(searchString)) {
          throw new TypeError('Cannot call method "endsWith" with a regex');
        }
        var searchStr = ES.ToString(searchString);
        var len = S.length;
        var endPosition;
        if (arguments.length > 1) {
          endPosition = arguments[1];
        }
        var pos = typeof endPosition === 'undefined' ? len : ES.ToInteger(endPosition);
        var end = _min(_max(pos, 0), len);
        return _strSlice(S, end - searchStr.length, end) === searchStr;
      },
  
      includes: function includes(searchString) {
        if (ES.IsRegExp(searchString)) {
          throw new TypeError('"includes" does not accept a RegExp');
        }
        var searchStr = ES.ToString(searchString);
        var position;
        if (arguments.length > 1) {
          position = arguments[1];
        }
        // Somehow this trick makes method 100% compat with the spec.
        return _indexOf(this, searchStr, position) !== -1;
      },
  
      codePointAt: function codePointAt(pos) {
        var thisStr = ES.ToString(ES.RequireObjectCoercible(this));
        var position = ES.ToInteger(pos);
        var length = thisStr.length;
        if (position >= 0 && position < length) {
          var first = thisStr.charCodeAt(position);
          var isEnd = position + 1 === length;
          if (first < 0xD800 || first > 0xDBFF || isEnd) { return first; }
          var second = thisStr.charCodeAt(position + 1);
          if (second < 0xDC00 || second > 0xDFFF) { return first; }
          return ((first - 0xD800) * 1024) + (second - 0xDC00) + 0x10000;
        }
      }
    };
    if (String.prototype.includes && 'a'.includes('a', Infinity) !== false) {
      overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);
    }
  
    if (String.prototype.startsWith && String.prototype.endsWith) {
      var startsWithRejectsRegex = throwsError(function () {
        /* throws if spec-compliant */
        '/a/'.startsWith(/a/);
      });
      var startsWithHandlesInfinity = valueOrFalseIfThrows(function () {
        return 'abc'.startsWith('a', Infinity) === false;
      });
      if (!startsWithRejectsRegex || !startsWithHandlesInfinity) {
        // Firefox (< 37?) and IE 11 TP have a noncompliant startsWith implementation
        overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);
        overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);
      }
    }
    if (hasSymbols) {
      var startsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {
        var re = /a/;
        re[Symbol.match] = false;
        return '/a/'.startsWith(re);
      });
      if (!startsWithSupportsSymbolMatch) {
        overrideNative(String.prototype, 'startsWith', StringPrototypeShims.startsWith);
      }
      var endsWithSupportsSymbolMatch = valueOrFalseIfThrows(function () {
        var re = /a/;
        re[Symbol.match] = false;
        return '/a/'.endsWith(re);
      });
      if (!endsWithSupportsSymbolMatch) {
        overrideNative(String.prototype, 'endsWith', StringPrototypeShims.endsWith);
      }
      var includesSupportsSymbolMatch = valueOrFalseIfThrows(function () {
        var re = /a/;
        re[Symbol.match] = false;
        return '/a/'.includes(re);
      });
      if (!includesSupportsSymbolMatch) {
        overrideNative(String.prototype, 'includes', StringPrototypeShims.includes);
      }
    }
  
    defineProperties(String.prototype, StringPrototypeShims);
  
    // whitespace from: http://es5.github.io/#x15.5.4.20
    // implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
    var ws = [
      '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
      '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
      '\u2029\uFEFF'
    ].join('');
    var trimRegexp = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
    var trimShim = function trim() {
      return ES.ToString(ES.RequireObjectCoercible(this)).replace(trimRegexp, '');
    };
    var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
    var nonWSregex = new RegExp('[' + nonWS + ']', 'g');
    var isBadHexRegex = /^[-+]0x[0-9a-f]+$/i;
    var hasStringTrimBug = nonWS.trim().length !== nonWS.length;
    defineProperty(String.prototype, 'trim', trimShim, hasStringTrimBug);
  
    // Given an argument x, it will return an IteratorResult object,
    // with value set to x and done to false.
    // Given no arguments, it will return an iterator completion object.
    var iteratorResult = function (x) {
      return { value: x, done: arguments.length === 0 };
    };
  
    // see http://www.ecma-international.org/ecma-262/6.0/#sec-string.prototype-@@iterator
    var StringIterator = function (s) {
      ES.RequireObjectCoercible(s);
      this._s = ES.ToString(s);
      this._i = 0;
    };
    StringIterator.prototype.next = function () {
      var s = this._s;
      var i = this._i;
      if (typeof s === 'undefined' || i >= s.length) {
        this._s = void 0;
        return iteratorResult();
      }
      var first = s.charCodeAt(i);
      var second, len;
      if (first < 0xD800 || first > 0xDBFF || (i + 1) === s.length) {
        len = 1;
      } else {
        second = s.charCodeAt(i + 1);
        len = (second < 0xDC00 || second > 0xDFFF) ? 1 : 2;
      }
      this._i = i + len;
      return iteratorResult(s.substr(i, len));
    };
    addIterator(StringIterator.prototype);
    addIterator(String.prototype, function () {
      return new StringIterator(this);
    });
  
    var ArrayShims = {
      from: function from(items) {
        var C = this;
        var mapFn;
        if (arguments.length > 1) {
          mapFn = arguments[1];
        }
        var mapping, T;
        if (typeof mapFn === 'undefined') {
          mapping = false;
        } else {
          if (!ES.IsCallable(mapFn)) {
            throw new TypeError('Array.from: when provided, the second argument must be a function');
          }
          if (arguments.length > 2) {
            T = arguments[2];
          }
          mapping = true;
        }
  
        // Note that that Arrays will use ArrayIterator:
        // https://bugs.ecmascript.org/show_bug.cgi?id=2416
        var usingIterator = typeof (isArguments(items) || ES.GetMethod(items, $iterator$)) !== 'undefined';
  
        var length, result, i;
        if (usingIterator) {
          result = ES.IsConstructor(C) ? Object(new C()) : [];
          var iterator = ES.GetIterator(items);
          var next, nextValue;
  
          i = 0;
          while (true) {
            next = ES.IteratorStep(iterator);
            if (next === false) {
              break;
            }
            nextValue = next.value;
            try {
              if (mapping) {
                nextValue = typeof T === 'undefined' ? mapFn(nextValue, i) : _call(mapFn, T, nextValue, i);
              }
              result[i] = nextValue;
            } catch (e) {
              ES.IteratorClose(iterator, true);
              throw e;
            }
            i += 1;
          }
          length = i;
        } else {
          var arrayLike = ES.ToObject(items);
          length = ES.ToLength(arrayLike.length);
          result = ES.IsConstructor(C) ? Object(new C(length)) : new Array(length);
          var value;
          for (i = 0; i < length; ++i) {
            value = arrayLike[i];
            if (mapping) {
              value = typeof T === 'undefined' ? mapFn(value, i) : _call(mapFn, T, value, i);
            }
            createDataPropertyOrThrow(result, i, value);
          }
        }
  
        result.length = length;
        return result;
      },
  
      of: function of() {
        var len = arguments.length;
        var C = this;
        var A = isArray(C) || !ES.IsCallable(C) ? new Array(len) : ES.Construct(C, [len]);
        for (var k = 0; k < len; ++k) {
          createDataPropertyOrThrow(A, k, arguments[k]);
        }
        A.length = len;
        return A;
      }
    };
    defineProperties(Array, ArrayShims);
    addDefaultSpecies(Array);
  
    // Our ArrayIterator is private; see
    // https://github.com/paulmillr/es6-shim/issues/252
    ArrayIterator = function (array, kind) {
      this.i = 0;
      this.array = array;
      this.kind = kind;
    };
  
    defineProperties(ArrayIterator.prototype, {
      next: function () {
        var i = this.i;
        var array = this.array;
        if (!(this instanceof ArrayIterator)) {
          throw new TypeError('Not an ArrayIterator');
        }
        if (typeof array !== 'undefined') {
          var len = ES.ToLength(array.length);
          for (; i < len; i++) {
            var kind = this.kind;
            var retval;
            if (kind === 'key') {
              retval = i;
            } else if (kind === 'value') {
              retval = array[i];
            } else if (kind === 'entry') {
              retval = [i, array[i]];
            }
            this.i = i + 1;
            return iteratorResult(retval);
          }
        }
        this.array = void 0;
        return iteratorResult();
      }
    });
    addIterator(ArrayIterator.prototype);
  
    /*
    var orderKeys = function orderKeys(a, b) {
      var aNumeric = String(ES.ToInteger(a)) === a;
      var bNumeric = String(ES.ToInteger(b)) === b;
      if (aNumeric && bNumeric) {
        return b - a;
      } else if (aNumeric && !bNumeric) {
        return -1;
      } else if (!aNumeric && bNumeric) {
        return 1;
      } else {
        return a.localeCompare(b);
      }
    };
  
    var getAllKeys = function getAllKeys(object) {
      var ownKeys = [];
      var keys = [];
  
      for (var key in object) {
        _push(_hasOwnProperty(object, key) ? ownKeys : keys, key);
      }
      _sort(ownKeys, orderKeys);
      _sort(keys, orderKeys);
  
      return _concat(ownKeys, keys);
    };
    */
  
    // note: this is positioned here because it depends on ArrayIterator
    var arrayOfSupportsSubclassing = Array.of === ArrayShims.of || (function () {
      // Detects a bug in Webkit nightly r181886
      var Foo = function Foo(len) { this.length = len; };
      Foo.prototype = [];
      var fooArr = Array.of.apply(Foo, [1, 2]);
      return fooArr instanceof Foo && fooArr.length === 2;
    }());
    if (!arrayOfSupportsSubclassing) {
      overrideNative(Array, 'of', ArrayShims.of);
    }
  
    var ArrayPrototypeShims = {
      copyWithin: function copyWithin(target, start) {
        var o = ES.ToObject(this);
        var len = ES.ToLength(o.length);
        var relativeTarget = ES.ToInteger(target);
        var relativeStart = ES.ToInteger(start);
        var to = relativeTarget < 0 ? _max(len + relativeTarget, 0) : _min(relativeTarget, len);
        var from = relativeStart < 0 ? _max(len + relativeStart, 0) : _min(relativeStart, len);
        var end;
        if (arguments.length > 2) {
          end = arguments[2];
        }
        var relativeEnd = typeof end === 'undefined' ? len : ES.ToInteger(end);
        var finalItem = relativeEnd < 0 ? _max(len + relativeEnd, 0) : _min(relativeEnd, len);
        var count = _min(finalItem - from, len - to);
        var direction = 1;
        if (from < to && to < (from + count)) {
          direction = -1;
          from += count - 1;
          to += count - 1;
        }
        while (count > 0) {
          if (from in o) {
            o[to] = o[from];
          } else {
            delete o[to];
          }
          from += direction;
          to += direction;
          count -= 1;
        }
        return o;
      },
  
      fill: function fill(value) {
        var start;
        if (arguments.length > 1) {
          start = arguments[1];
        }
        var end;
        if (arguments.length > 2) {
          end = arguments[2];
        }
        var O = ES.ToObject(this);
        var len = ES.ToLength(O.length);
        start = ES.ToInteger(typeof start === 'undefined' ? 0 : start);
        end = ES.ToInteger(typeof end === 'undefined' ? len : end);
  
        var relativeStart = start < 0 ? _max(len + start, 0) : _min(start, len);
        var relativeEnd = end < 0 ? len + end : end;
  
        for (var i = relativeStart; i < len && i < relativeEnd; ++i) {
          O[i] = value;
        }
        return O;
      },
  
      find: function find(predicate) {
        var list = ES.ToObject(this);
        var length = ES.ToLength(list.length);
        if (!ES.IsCallable(predicate)) {
          throw new TypeError('Array#find: predicate must be a function');
        }
        var thisArg = arguments.length > 1 ? arguments[1] : null;
        for (var i = 0, value; i < length; i++) {
          value = list[i];
          if (thisArg) {
            if (_call(predicate, thisArg, value, i, list)) {
              return value;
            }
          } else if (predicate(value, i, list)) {
            return value;
          }
        }
      },
  
      findIndex: function findIndex(predicate) {
        var list = ES.ToObject(this);
        var length = ES.ToLength(list.length);
        if (!ES.IsCallable(predicate)) {
          throw new TypeError('Array#findIndex: predicate must be a function');
        }
        var thisArg = arguments.length > 1 ? arguments[1] : null;
        for (var i = 0; i < length; i++) {
          if (thisArg) {
            if (_call(predicate, thisArg, list[i], i, list)) {
              return i;
            }
          } else if (predicate(list[i], i, list)) {
            return i;
          }
        }
        return -1;
      },
  
      keys: function keys() {
        return new ArrayIterator(this, 'key');
      },
  
      values: function values() {
        return new ArrayIterator(this, 'value');
      },
  
      entries: function entries() {
        return new ArrayIterator(this, 'entry');
      }
    };
    // Safari 7.1 defines Array#keys and Array#entries natively,
    // but the resulting ArrayIterator objects don't have a "next" method.
    if (Array.prototype.keys && !ES.IsCallable([1].keys().next)) {
      delete Array.prototype.keys;
    }
    if (Array.prototype.entries && !ES.IsCallable([1].entries().next)) {
      delete Array.prototype.entries;
    }
  
    // Chrome 38 defines Array#keys and Array#entries, and Array#@@iterator, but not Array#values
    if (Array.prototype.keys && Array.prototype.entries && !Array.prototype.values && Array.prototype[$iterator$]) {
      defineProperties(Array.prototype, {
        values: Array.prototype[$iterator$]
      });
      if (Type.symbol(Symbol.unscopables)) {
        Array.prototype[Symbol.unscopables].values = true;
      }
    }
    // Chrome 40 defines Array#values with the incorrect name, although Array#{keys,entries} have the correct name
    if (functionsHaveNames && Array.prototype.values && Array.prototype.values.name !== 'values') {
      var originalArrayPrototypeValues = Array.prototype.values;
      overrideNative(Array.prototype, 'values', function values() { return ES.Call(originalArrayPrototypeValues, this, arguments); });
      defineProperty(Array.prototype, $iterator$, Array.prototype.values, true);
    }
    defineProperties(Array.prototype, ArrayPrototypeShims);
  
    if (1 / [true].indexOf(true, -0) < 0) {
      // indexOf when given a position arg of -0 should return +0.
      // https://github.com/tc39/ecma262/pull/316
      defineProperty(Array.prototype, 'indexOf', function indexOf(searchElement) {
        var value = _arrayIndexOfApply(this, arguments);
        if (value === 0 && (1 / value) < 0) {
          return 0;
        }
        return value;
      }, true);
    }
  
    addIterator(Array.prototype, function () { return this.values(); });
    // Chrome defines keys/values/entries on Array, but doesn't give us
    // any way to identify its iterator.  So add our own shimmed field.
    if (Object.getPrototypeOf) {
      addIterator(Object.getPrototypeOf([].values()));
    }
  
    // note: this is positioned here because it relies on Array#entries
    var arrayFromSwallowsNegativeLengths = (function () {
      // Detects a Firefox bug in v32
      // https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
      return valueOrFalseIfThrows(function () {
        return Array.from({ length: -1 }).length === 0;
      });
    }());
    var arrayFromHandlesIterables = (function () {
      // Detects a bug in Webkit nightly r181886
      var arr = Array.from([0].entries());
      return arr.length === 1 && isArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
    }());
    if (!arrayFromSwallowsNegativeLengths || !arrayFromHandlesIterables) {
      overrideNative(Array, 'from', ArrayShims.from);
    }
    var arrayFromHandlesUndefinedMapFunction = (function () {
      // Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
      // but the spec doesn't care if it's provided or not - undefined doesn't throw.
      return valueOrFalseIfThrows(function () {
        return Array.from([0], void 0);
      });
    }());
    if (!arrayFromHandlesUndefinedMapFunction) {
      var origArrayFrom = Array.from;
      overrideNative(Array, 'from', function from(items) {
        if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
          return ES.Call(origArrayFrom, this, arguments);
        } else {
          return _call(origArrayFrom, this, items);
        }
      });
    }
  
    var int32sAsOne = -(Math.pow(2, 32) - 1);
    var toLengthsCorrectly = function (method, reversed) {
      var obj = { length: int32sAsOne };
      obj[reversed ? (obj.length >>> 0) - 1 : 0] = true;
      return valueOrFalseIfThrows(function () {
        _call(method, obj, function () {
          // note: in nonconforming browsers, this will be called
          // -1 >>> 0 times, which is 4294967295, so the throw matters.
          throw new RangeError('should not reach here');
        }, []);
        return true;
      });
    };
    if (!toLengthsCorrectly(Array.prototype.forEach)) {
      var originalForEach = Array.prototype.forEach;
      overrideNative(Array.prototype, 'forEach', function forEach(callbackFn) {
        return ES.Call(originalForEach, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.map)) {
      var originalMap = Array.prototype.map;
      overrideNative(Array.prototype, 'map', function map(callbackFn) {
        return ES.Call(originalMap, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.filter)) {
      var originalFilter = Array.prototype.filter;
      overrideNative(Array.prototype, 'filter', function filter(callbackFn) {
        return ES.Call(originalFilter, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.some)) {
      var originalSome = Array.prototype.some;
      overrideNative(Array.prototype, 'some', function some(callbackFn) {
        return ES.Call(originalSome, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.every)) {
      var originalEvery = Array.prototype.every;
      overrideNative(Array.prototype, 'every', function every(callbackFn) {
        return ES.Call(originalEvery, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.reduce)) {
      var originalReduce = Array.prototype.reduce;
      overrideNative(Array.prototype, 'reduce', function reduce(callbackFn) {
        return ES.Call(originalReduce, this.length >= 0 ? this : [], arguments);
      }, true);
    }
    if (!toLengthsCorrectly(Array.prototype.reduceRight, true)) {
      var originalReduceRight = Array.prototype.reduceRight;
      overrideNative(Array.prototype, 'reduceRight', function reduceRight(callbackFn) {
        return ES.Call(originalReduceRight, this.length >= 0 ? this : [], arguments);
      }, true);
    }
  
    var lacksOctalSupport = Number('0o10') !== 8;
    var lacksBinarySupport = Number('0b10') !== 2;
    var trimsNonWhitespace = _some(nonWS, function (c) {
      return Number(c + 0 + c) === 0;
    });
    if (lacksOctalSupport || lacksBinarySupport || trimsNonWhitespace) {
      var OrigNumber = Number;
      var binaryRegex = /^0b[01]+$/i;
      var octalRegex = /^0o[0-7]+$/i;
      // Note that in IE 8, RegExp.prototype.test doesn't seem to exist: ie, "test" is an own property of regexes. wtf.
      var isBinary = binaryRegex.test.bind(binaryRegex);
      var isOctal = octalRegex.test.bind(octalRegex);
      var toPrimitive = function (O) { // need to replace this with `es-to-primitive/es6`
        var result;
        if (typeof O.valueOf === 'function') {
          result = O.valueOf();
          if (Type.primitive(result)) {
            return result;
          }
        }
        if (typeof O.toString === 'function') {
          result = O.toString();
          if (Type.primitive(result)) {
            return result;
          }
        }
        throw new TypeError('No default value');
      };
      var hasNonWS = nonWSregex.test.bind(nonWSregex);
      var isBadHex = isBadHexRegex.test.bind(isBadHexRegex);
      var NumberShim = (function () {
        // this is wrapped in an IIFE because of IE 6-8's wacky scoping issues with named function expressions.
        var NumberShim = function Number(value) {
          var primValue;
          if (arguments.length > 0) {
            primValue = Type.primitive(value) ? value : toPrimitive(value, 'number');
          } else {
            primValue = 0;
          }
          if (typeof primValue === 'string') {
            primValue = ES.Call(trimShim, primValue);
            if (isBinary(primValue)) {
              primValue = parseInt(_strSlice(primValue, 2), 2);
            } else if (isOctal(primValue)) {
              primValue = parseInt(_strSlice(primValue, 2), 8);
            } else if (hasNonWS(primValue) || isBadHex(primValue)) {
              primValue = NaN;
            }
          }
          var receiver = this;
          var valueOfSucceeds = valueOrFalseIfThrows(function () {
            OrigNumber.prototype.valueOf.call(receiver);
            return true;
          });
          if (receiver instanceof NumberShim && !valueOfSucceeds) {
            return new OrigNumber(primValue);
          }
          /* jshint newcap: false */
          return OrigNumber(primValue);
          /* jshint newcap: true */
        };
        return NumberShim;
      }());
      wrapConstructor(OrigNumber, NumberShim, {});
      // this is necessary for ES3 browsers, where these properties are non-enumerable.
      defineProperties(NumberShim, {
        NaN: OrigNumber.NaN,
        MAX_VALUE: OrigNumber.MAX_VALUE,
        MIN_VALUE: OrigNumber.MIN_VALUE,
        NEGATIVE_INFINITY: OrigNumber.NEGATIVE_INFINITY,
        POSITIVE_INFINITY: OrigNumber.POSITIVE_INFINITY
      });
      /* globals Number: true */
      /* eslint-disable no-undef, no-global-assign */
      /* jshint -W020 */
      Number = NumberShim;
      Value.redefine(globals, 'Number', NumberShim);
      /* jshint +W020 */
      /* eslint-enable no-undef, no-global-assign */
      /* globals Number: false */
    }
  
    var maxSafeInteger = Math.pow(2, 53) - 1;
    defineProperties(Number, {
      MAX_SAFE_INTEGER: maxSafeInteger,
      MIN_SAFE_INTEGER: -maxSafeInteger,
      EPSILON: 2.220446049250313e-16,
  
      parseInt: globals.parseInt,
      parseFloat: globals.parseFloat,
  
      isFinite: numberIsFinite,
  
      isInteger: function isInteger(value) {
        return numberIsFinite(value) && ES.ToInteger(value) === value;
      },
  
      isSafeInteger: function isSafeInteger(value) {
        return Number.isInteger(value) && _abs(value) <= Number.MAX_SAFE_INTEGER;
      },
  
      isNaN: numberIsNaN
    });
    // Firefox 37 has a conforming Number.parseInt, but it's not === to the global parseInt (fixed in v40)
    defineProperty(Number, 'parseInt', globals.parseInt, Number.parseInt !== globals.parseInt);
  
    // Work around bugs in Array#find and Array#findIndex -- early
    // implementations skipped holes in sparse arrays. (Note that the
    // implementations of find/findIndex indirectly use shimmed
    // methods of Number, so this test has to happen down here.)
    /*jshint elision: true */
    /* eslint-disable no-sparse-arrays */
    if ([, 1].find(function () { return true; }) === 1) {
      overrideNative(Array.prototype, 'find', ArrayPrototypeShims.find);
    }
    if ([, 1].findIndex(function () { return true; }) !== 0) {
      overrideNative(Array.prototype, 'findIndex', ArrayPrototypeShims.findIndex);
    }
    /* eslint-enable no-sparse-arrays */
    /*jshint elision: false */
  
    var isEnumerableOn = Function.bind.call(Function.bind, Object.prototype.propertyIsEnumerable);
    var ensureEnumerable = function ensureEnumerable(obj, prop) {
      if (supportsDescriptors && isEnumerableOn(obj, prop)) {
        Object.defineProperty(obj, prop, { enumerable: false });
      }
    };
    var sliceArgs = function sliceArgs() {
      // per https://github.com/petkaantonov/bluebird/wiki/Optimization-killers#32-leaking-arguments
      // and https://gist.github.com/WebReflection/4327762cb87a8c634a29
      var initial = Number(this);
      var len = arguments.length;
      var desiredArgCount = len - initial;
      var args = new Array(desiredArgCount < 0 ? 0 : desiredArgCount);
      for (var i = initial; i < len; ++i) {
        args[i - initial] = arguments[i];
      }
      return args;
    };
    var assignTo = function assignTo(source) {
      return function assignToSource(target, key) {
        target[key] = source[key];
        return target;
      };
    };
    var assignReducer = function (target, source) {
      var sourceKeys = keys(Object(source));
      var symbols;
      if (ES.IsCallable(Object.getOwnPropertySymbols)) {
        symbols = _filter(Object.getOwnPropertySymbols(Object(source)), isEnumerableOn(source));
      }
      return _reduce(_concat(sourceKeys, symbols || []), assignTo(source), target);
    };
  
    var ObjectShims = {
      // 19.1.3.1
      assign: function (target, source) {
        var to = ES.ToObject(target, 'Cannot convert undefined or null to object');
        return _reduce(ES.Call(sliceArgs, 1, arguments), assignReducer, to);
      },
  
      // Added in WebKit in https://bugs.webkit.org/show_bug.cgi?id=143865
      is: function is(a, b) {
        return ES.SameValue(a, b);
      }
    };
    var assignHasPendingExceptions = Object.assign && Object.preventExtensions && (function () {
      // Firefox 37 still has "pending exception" logic in its Object.assign implementation,
      // which is 72% slower than our shim, and Firefox 40's native implementation.
      var thrower = Object.preventExtensions({ 1: 2 });
      try {
        Object.assign(thrower, 'xy');
      } catch (e) {
        return thrower[1] === 'y';
      }
    }());
    if (assignHasPendingExceptions) {
      overrideNative(Object, 'assign', ObjectShims.assign);
    }
    defineProperties(Object, ObjectShims);
  
    if (supportsDescriptors) {
      var ES5ObjectShims = {
        // 19.1.3.9
        // shim from https://gist.github.com/WebReflection/5593554
        setPrototypeOf: (function (Object, magic) {
          var set;
  
          var checkArgs = function (O, proto) {
            if (!ES.TypeIsObject(O)) {
              throw new TypeError('cannot set prototype on a non-object');
            }
            if (!(proto === null || ES.TypeIsObject(proto))) {
              throw new TypeError('can only set prototype to an object or null' + proto);
            }
          };
  
          var setPrototypeOf = function (O, proto) {
            checkArgs(O, proto);
            _call(set, O, proto);
            return O;
          };
  
          try {
            // this works already in Firefox and Safari
            set = Object.getOwnPropertyDescriptor(Object.prototype, magic).set;
            _call(set, {}, null);
          } catch (e) {
            if (Object.prototype !== {}[magic]) {
              // IE < 11 cannot be shimmed
              return;
            }
            // probably Chrome or some old Mobile stock browser
            set = function (proto) {
              this[magic] = proto;
            };
            // please note that this will **not** work
            // in those browsers that do not inherit
            // __proto__ by mistake from Object.prototype
            // in these cases we should probably throw an error
            // or at least be informed about the issue
            setPrototypeOf.polyfill = setPrototypeOf(
              setPrototypeOf({}, null),
              Object.prototype
            ) instanceof Object;
            // setPrototypeOf.polyfill === true means it works as meant
            // setPrototypeOf.polyfill === false means it's not 100% reliable
            // setPrototypeOf.polyfill === undefined
            // or
            // setPrototypeOf.polyfill ==  null means it's not a polyfill
            // which means it works as expected
            // we can even delete Object.prototype.__proto__;
          }
          return setPrototypeOf;
        }(Object, '__proto__'))
      };
  
      defineProperties(Object, ES5ObjectShims);
    }
  
    // Workaround bug in Opera 12 where setPrototypeOf(x, null) doesn't work,
    // but Object.create(null) does.
    if (Object.setPrototypeOf && Object.getPrototypeOf &&
        Object.getPrototypeOf(Object.setPrototypeOf({}, null)) !== null &&
        Object.getPrototypeOf(Object.create(null)) === null) {
      (function () {
        var FAKENULL = Object.create(null);
        var gpo = Object.getPrototypeOf;
        var spo = Object.setPrototypeOf;
        Object.getPrototypeOf = function (o) {
          var result = gpo(o);
          return result === FAKENULL ? null : result;
        };
        Object.setPrototypeOf = function (o, p) {
          var proto = p === null ? FAKENULL : p;
          return spo(o, proto);
        };
        Object.setPrototypeOf.polyfill = false;
      }());
    }
  
    var objectKeysAcceptsPrimitives = !throwsError(function () { Object.keys('foo'); });
    if (!objectKeysAcceptsPrimitives) {
      var originalObjectKeys = Object.keys;
      overrideNative(Object, 'keys', function keys(value) {
        return originalObjectKeys(ES.ToObject(value));
      });
      keys = Object.keys;
    }
    var objectKeysRejectsRegex = throwsError(function () { Object.keys(/a/g); });
    if (objectKeysRejectsRegex) {
      var regexRejectingObjectKeys = Object.keys;
      overrideNative(Object, 'keys', function keys(value) {
        if (Type.regex(value)) {
          var regexKeys = [];
          for (var k in value) {
            if (_hasOwnProperty(value, k)) {
              _push(regexKeys, k);
            }
          }
          return regexKeys;
        }
        return regexRejectingObjectKeys(value);
      });
      keys = Object.keys;
    }
  
    if (Object.getOwnPropertyNames) {
      var objectGOPNAcceptsPrimitives = !throwsError(function () { Object.getOwnPropertyNames('foo'); });
      if (!objectGOPNAcceptsPrimitives) {
        var cachedWindowNames = typeof window === 'object' ? Object.getOwnPropertyNames(window) : [];
        var originalObjectGetOwnPropertyNames = Object.getOwnPropertyNames;
        overrideNative(Object, 'getOwnPropertyNames', function getOwnPropertyNames(value) {
          var val = ES.ToObject(value);
          if (_toString(val) === '[object Window]') {
            try {
              return originalObjectGetOwnPropertyNames(val);
            } catch (e) {
              // IE bug where layout engine calls userland gOPN for cross-domain `window` objects
              return _concat([], cachedWindowNames);
            }
          }
          return originalObjectGetOwnPropertyNames(val);
        });
      }
    }
    if (Object.getOwnPropertyDescriptor) {
      var objectGOPDAcceptsPrimitives = !throwsError(function () { Object.getOwnPropertyDescriptor('foo', 'bar'); });
      if (!objectGOPDAcceptsPrimitives) {
        var originalObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
        overrideNative(Object, 'getOwnPropertyDescriptor', function getOwnPropertyDescriptor(value, property) {
          return originalObjectGetOwnPropertyDescriptor(ES.ToObject(value), property);
        });
      }
    }
    if (Object.seal) {
      var objectSealAcceptsPrimitives = !throwsError(function () { Object.seal('foo'); });
      if (!objectSealAcceptsPrimitives) {
        var originalObjectSeal = Object.seal;
        overrideNative(Object, 'seal', function seal(value) {
          if (!ES.TypeIsObject(value)) { return value; }
          return originalObjectSeal(value);
        });
      }
    }
    if (Object.isSealed) {
      var objectIsSealedAcceptsPrimitives = !throwsError(function () { Object.isSealed('foo'); });
      if (!objectIsSealedAcceptsPrimitives) {
        var originalObjectIsSealed = Object.isSealed;
        overrideNative(Object, 'isSealed', function isSealed(value) {
          if (!ES.TypeIsObject(value)) { return true; }
          return originalObjectIsSealed(value);
        });
      }
    }
    if (Object.freeze) {
      var objectFreezeAcceptsPrimitives = !throwsError(function () { Object.freeze('foo'); });
      if (!objectFreezeAcceptsPrimitives) {
        var originalObjectFreeze = Object.freeze;
        overrideNative(Object, 'freeze', function freeze(value) {
          if (!ES.TypeIsObject(value)) { return value; }
          return originalObjectFreeze(value);
        });
      }
    }
    if (Object.isFrozen) {
      var objectIsFrozenAcceptsPrimitives = !throwsError(function () { Object.isFrozen('foo'); });
      if (!objectIsFrozenAcceptsPrimitives) {
        var originalObjectIsFrozen = Object.isFrozen;
        overrideNative(Object, 'isFrozen', function isFrozen(value) {
          if (!ES.TypeIsObject(value)) { return true; }
          return originalObjectIsFrozen(value);
        });
      }
    }
    if (Object.preventExtensions) {
      var objectPreventExtensionsAcceptsPrimitives = !throwsError(function () { Object.preventExtensions('foo'); });
      if (!objectPreventExtensionsAcceptsPrimitives) {
        var originalObjectPreventExtensions = Object.preventExtensions;
        overrideNative(Object, 'preventExtensions', function preventExtensions(value) {
          if (!ES.TypeIsObject(value)) { return value; }
          return originalObjectPreventExtensions(value);
        });
      }
    }
    if (Object.isExtensible) {
      var objectIsExtensibleAcceptsPrimitives = !throwsError(function () { Object.isExtensible('foo'); });
      if (!objectIsExtensibleAcceptsPrimitives) {
        var originalObjectIsExtensible = Object.isExtensible;
        overrideNative(Object, 'isExtensible', function isExtensible(value) {
          if (!ES.TypeIsObject(value)) { return false; }
          return originalObjectIsExtensible(value);
        });
      }
    }
    if (Object.getPrototypeOf) {
      var objectGetProtoAcceptsPrimitives = !throwsError(function () { Object.getPrototypeOf('foo'); });
      if (!objectGetProtoAcceptsPrimitives) {
        var originalGetProto = Object.getPrototypeOf;
        overrideNative(Object, 'getPrototypeOf', function getPrototypeOf(value) {
          return originalGetProto(ES.ToObject(value));
        });
      }
    }
  
    var hasFlags = supportsDescriptors && (function () {
      var desc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags');
      return desc && ES.IsCallable(desc.get);
    }());
    if (supportsDescriptors && !hasFlags) {
      var regExpFlagsGetter = function flags() {
        if (!ES.TypeIsObject(this)) {
          throw new TypeError('Method called on incompatible type: must be an object.');
        }
        var result = '';
        if (this.global) {
          result += 'g';
        }
        if (this.ignoreCase) {
          result += 'i';
        }
        if (this.multiline) {
          result += 'm';
        }
        if (this.unicode) {
          result += 'u';
        }
        if (this.sticky) {
          result += 'y';
        }
        return result;
      };
  
      Value.getter(RegExp.prototype, 'flags', regExpFlagsGetter);
    }
  
    var regExpSupportsFlagsWithRegex = supportsDescriptors && valueOrFalseIfThrows(function () {
      return String(new RegExp(/a/g, 'i')) === '/a/i';
    });
    var regExpNeedsToSupportSymbolMatch = hasSymbols && supportsDescriptors && (function () {
      // Edge 0.12 supports flags fully, but does not support Symbol.match
      var regex = /./;
      regex[Symbol.match] = false;
      return RegExp(regex) === regex;
    }());
  
    var regexToStringIsGeneric = valueOrFalseIfThrows(function () {
      return RegExp.prototype.toString.call({ source: 'abc' }) === '/abc/';
    });
    var regexToStringSupportsGenericFlags = regexToStringIsGeneric && valueOrFalseIfThrows(function () {
      return RegExp.prototype.toString.call({ source: 'a', flags: 'b' }) === '/a/b';
    });
    if (!regexToStringIsGeneric || !regexToStringSupportsGenericFlags) {
      var origRegExpToString = RegExp.prototype.toString;
      defineProperty(RegExp.prototype, 'toString', function toString() {
        var R = ES.RequireObjectCoercible(this);
        if (Type.regex(R)) {
          return _call(origRegExpToString, R);
        }
        var pattern = $String(R.source);
        var flags = $String(R.flags);
        return '/' + pattern + '/' + flags;
      }, true);
      Value.preserveToString(RegExp.prototype.toString, origRegExpToString);
    }
  
    if (supportsDescriptors && (!regExpSupportsFlagsWithRegex || regExpNeedsToSupportSymbolMatch)) {
      var flagsGetter = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get;
      var sourceDesc = Object.getOwnPropertyDescriptor(RegExp.prototype, 'source') || {};
      var legacySourceGetter = function () {
        // prior to it being a getter, it's own + nonconfigurable
        return this.source;
      };
      var sourceGetter = ES.IsCallable(sourceDesc.get) ? sourceDesc.get : legacySourceGetter;
  
      var OrigRegExp = RegExp;
      var RegExpShim = (function () {
        return function RegExp(pattern, flags) {
          var patternIsRegExp = ES.IsRegExp(pattern);
          var calledWithNew = this instanceof RegExp;
          if (!calledWithNew && patternIsRegExp && typeof flags === 'undefined' && pattern.constructor === RegExp) {
            return pattern;
          }
  
          var P = pattern;
          var F = flags;
          if (Type.regex(pattern)) {
            P = ES.Call(sourceGetter, pattern);
            F = typeof flags === 'undefined' ? ES.Call(flagsGetter, pattern) : flags;
            return new RegExp(P, F);
          } else if (patternIsRegExp) {
            P = pattern.source;
            F = typeof flags === 'undefined' ? pattern.flags : flags;
          }
          return new OrigRegExp(pattern, flags);
        };
      }());
      wrapConstructor(OrigRegExp, RegExpShim, {
        $input: true // Chrome < v39 & Opera < 26 have a nonstandard "$input" property
      });
      /* globals RegExp: true */
      /* eslint-disable no-undef, no-global-assign */
      /* jshint -W020 */
      RegExp = RegExpShim;
      Value.redefine(globals, 'RegExp', RegExpShim);
      /* jshint +W020 */
      /* eslint-enable no-undef, no-global-assign */
      /* globals RegExp: false */
    }
  
    if (supportsDescriptors) {
      var regexGlobals = {
        input: '$_',
        lastMatch: '$&',
        lastParen: '$+',
        leftContext: '$`',
        rightContext: '$\''
      };
      _forEach(keys(regexGlobals), function (prop) {
        if (prop in RegExp && !(regexGlobals[prop] in RegExp)) {
          Value.getter(RegExp, regexGlobals[prop], function get() {
            return RegExp[prop];
          });
        }
      });
    }
    addDefaultSpecies(RegExp);
  
    var inverseEpsilon = 1 / Number.EPSILON;
    var roundTiesToEven = function roundTiesToEven(n) {
      // Even though this reduces down to `return n`, it takes advantage of built-in rounding.
      return (n + inverseEpsilon) - inverseEpsilon;
    };
    var BINARY_32_EPSILON = Math.pow(2, -23);
    var BINARY_32_MAX_VALUE = Math.pow(2, 127) * (2 - BINARY_32_EPSILON);
    var BINARY_32_MIN_VALUE = Math.pow(2, -126);
    var E = Math.E;
    var LOG2E = Math.LOG2E;
    var LOG10E = Math.LOG10E;
    var numberCLZ = Number.prototype.clz;
    delete Number.prototype.clz; // Safari 8 has Number#clz
  
    var MathShims = {
      acosh: function acosh(value) {
        var x = Number(value);
        if (numberIsNaN(x) || value < 1) { return NaN; }
        if (x === 1) { return 0; }
        if (x === Infinity) { return x; }
  
        var xInvSquared = 1 / (x * x);
        if (x < 2) {
          return _log1p(x - 1 + (_sqrt(1 - xInvSquared) * x));
        }
        var halfX = x / 2;
        return _log1p(halfX + (_sqrt(1 - xInvSquared) * halfX) - 1) + (1 / LOG2E);
      },
  
      asinh: function asinh(value) {
        var x = Number(value);
        if (x === 0 || !globalIsFinite(x)) {
          return x;
        }
  
        var a = _abs(x);
        var aSquared = a * a;
        var s = _sign(x);
        if (a < 1) {
          return s * _log1p(a + (aSquared / (_sqrt(aSquared + 1) + 1)));
        }
        return s * (_log1p((a / 2) + (_sqrt(1 + (1 / aSquared)) * a / 2) - 1) + (1 / LOG2E));
      },
  
      atanh: function atanh(value) {
        var x = Number(value);
  
        if (x === 0) { return x; }
        if (x === -1) { return -Infinity; }
        if (x === 1) { return Infinity; }
        if (numberIsNaN(x) || x < -1 || x > 1) {
          return NaN;
        }
  
        var a = _abs(x);
        return _sign(x) * _log1p(2 * a / (1 - a)) / 2;
      },
  
      cbrt: function cbrt(value) {
        var x = Number(value);
        if (x === 0) { return x; }
        var negate = x < 0;
        var result;
        if (negate) { x = -x; }
        if (x === Infinity) {
          result = Infinity;
        } else {
          result = _exp(_log(x) / 3);
          // from http://en.wikipedia.org/wiki/Cube_root#Numerical_methods
          result = ((x / (result * result)) + (2 * result)) / 3;
        }
        return negate ? -result : result;
      },
  
      clz32: function clz32(value) {
        // See https://bugs.ecmascript.org/show_bug.cgi?id=2465
        var x = Number(value);
        var number = ES.ToUint32(x);
        if (number === 0) {
          return 32;
        }
        return numberCLZ ? ES.Call(numberCLZ, number) : 31 - _floor(_log(number + 0.5) * LOG2E);
      },
  
      cosh: function cosh(value) {
        var x = Number(value);
        if (x === 0) { return 1; } // +0 or -0
        if (numberIsNaN(x)) { return NaN; }
        if (!globalIsFinite(x)) { return Infinity; }
  
        var t = _exp(_abs(x) - 1);
        return (t + (1 / (t * E * E))) * (E / 2);
      },
  
      expm1: function expm1(value) {
        var x = Number(value);
        if (x === -Infinity) { return -1; }
        if (!globalIsFinite(x) || x === 0) { return x; }
        if (_abs(x) > 0.5) {
          return _exp(x) - 1;
        }
        // A more precise approximation using Taylor series expansion
        // from https://github.com/paulmillr/es6-shim/issues/314#issuecomment-70293986
        var t = x;
        var sum = 0;
        var n = 1;
        while (sum + t !== sum) {
          sum += t;
          n += 1;
          t *= x / n;
        }
        return sum;
      },
  
      hypot: function hypot(x, y) {
        var result = 0;
        var largest = 0;
        for (var i = 0; i < arguments.length; ++i) {
          var value = _abs(Number(arguments[i]));
          if (largest < value) {
            result *= (largest / value) * (largest / value);
            result += 1;
            largest = value;
          } else {
            result += value > 0 ? (value / largest) * (value / largest) : value;
          }
        }
        return largest === Infinity ? Infinity : largest * _sqrt(result);
      },
  
      log2: function log2(value) {
        return _log(value) * LOG2E;
      },
  
      log10: function log10(value) {
        return _log(value) * LOG10E;
      },
  
      log1p: _log1p,
  
      sign: _sign,
  
      sinh: function sinh(value) {
        var x = Number(value);
        if (!globalIsFinite(x) || x === 0) { return x; }
  
        var a = _abs(x);
        if (a < 1) {
          var u = Math.expm1(a);
          return _sign(x) * u * (1 + (1 / (u + 1))) / 2;
        }
        var t = _exp(a - 1);
        return _sign(x) * (t - (1 / (t * E * E))) * (E / 2);
      },
  
      tanh: function tanh(value) {
        var x = Number(value);
        if (numberIsNaN(x) || x === 0) { return x; }
        // can exit early at +-20 as JS loses precision for true value at this integer
        if (x >= 20) { return 1; }
        if (x <= -20) { return -1; }
  
        return (Math.expm1(x) - Math.expm1(-x)) / (_exp(x) + _exp(-x));
      },
  
      trunc: function trunc(value) {
        var x = Number(value);
        return x < 0 ? -_floor(-x) : _floor(x);
      },
  
      imul: function imul(x, y) {
        // taken from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/imul
        var a = ES.ToUint32(x);
        var b = ES.ToUint32(y);
        var ah = (a >>> 16) & 0xffff;
        var al = a & 0xffff;
        var bh = (b >>> 16) & 0xffff;
        var bl = b & 0xffff;
        // the shift by 0 fixes the sign on the high part
        // the final |0 converts the unsigned value into a signed value
        return (al * bl) + ((((ah * bl) + (al * bh)) << 16) >>> 0) | 0;
      },
  
      fround: function fround(x) {
        var v = Number(x);
        if (v === 0 || v === Infinity || v === -Infinity || numberIsNaN(v)) {
          return v;
        }
        var sign = _sign(v);
        var abs = _abs(v);
        if (abs < BINARY_32_MIN_VALUE) {
          return sign * roundTiesToEven(abs / BINARY_32_MIN_VALUE / BINARY_32_EPSILON) * BINARY_32_MIN_VALUE * BINARY_32_EPSILON;
        }
        // Veltkamp's splitting (?)
        var a = (1 + (BINARY_32_EPSILON / Number.EPSILON)) * abs;
        var result = a - (a - abs);
        if (result > BINARY_32_MAX_VALUE || numberIsNaN(result)) {
          return sign * Infinity;
        }
        return sign * result;
      }
    };
  
    var withinULPDistance = function withinULPDistance(result, expected, distance) {
      return _abs(1 - (result / expected)) / Number.EPSILON < (distance || 8);
    };
  
    defineProperties(Math, MathShims);
    // Chrome < 40 sinh returns ∞ for large numbers
    defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(710) === Infinity);
    // Chrome < 40 cosh returns ∞ for large numbers
    defineProperty(Math, 'cosh', MathShims.cosh, Math.cosh(710) === Infinity);
    // IE 11 TP has an imprecise log1p: reports Math.log1p(-1e-17) as 0
    defineProperty(Math, 'log1p', MathShims.log1p, Math.log1p(-1e-17) !== -1e-17);
    // IE 11 TP has an imprecise asinh: reports Math.asinh(-1e7) as not exactly equal to -Math.asinh(1e7)
    defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(-1e7) !== -Math.asinh(1e7));
    // Chrome < 54 asinh returns ∞ for large numbers and should not
    defineProperty(Math, 'asinh', MathShims.asinh, Math.asinh(1e+300) === Infinity);
    // Chrome < 54 atanh incorrectly returns 0 for large numbers
    defineProperty(Math, 'atanh', MathShims.atanh, Math.atanh(1e-300) === 0);
    // Chrome 40 has an imprecise Math.tanh with very small numbers
    defineProperty(Math, 'tanh', MathShims.tanh, Math.tanh(-2e-17) !== -2e-17);
    // Chrome 40 loses Math.acosh precision with high numbers
    defineProperty(Math, 'acosh', MathShims.acosh, Math.acosh(Number.MAX_VALUE) === Infinity);
    // Chrome < 54 has an inaccurate acosh for EPSILON deltas
    defineProperty(Math, 'acosh', MathShims.acosh, !withinULPDistance(Math.acosh(1 + Number.EPSILON), Math.sqrt(2 * Number.EPSILON)));
    // Firefox 38 on Windows
    defineProperty(Math, 'cbrt', MathShims.cbrt, !withinULPDistance(Math.cbrt(1e-300), 1e-100));
    // node 0.11 has an imprecise Math.sinh with very small numbers
    defineProperty(Math, 'sinh', MathShims.sinh, Math.sinh(-2e-17) !== -2e-17);
    // FF 35 on Linux reports 22025.465794806725 for Math.expm1(10)
    var expm1OfTen = Math.expm1(10);
    defineProperty(Math, 'expm1', MathShims.expm1, expm1OfTen > 22025.465794806719 || expm1OfTen < 22025.4657948067165168);
  
    var origMathRound = Math.round;
    // breaks in e.g. Safari 8, Internet Explorer 11, Opera 12
    var roundHandlesBoundaryConditions = Math.round(0.5 - (Number.EPSILON / 4)) === 0 &&
      Math.round(-0.5 + (Number.EPSILON / 3.99)) === 1;
  
    // When engines use Math.floor(x + 0.5) internally, Math.round can be buggy for large integers.
    // This behavior should be governed by "round to nearest, ties to even mode"
    // see http://www.ecma-international.org/ecma-262/6.0/#sec-terms-and-definitions-number-type
    // These are the boundary cases where it breaks.
    var smallestPositiveNumberWhereRoundBreaks = inverseEpsilon + 1;
    var largestPositiveNumberWhereRoundBreaks = (2 * inverseEpsilon) - 1;
    var roundDoesNotIncreaseIntegers = [
      smallestPositiveNumberWhereRoundBreaks,
      largestPositiveNumberWhereRoundBreaks
    ].every(function (num) {
      return Math.round(num) === num;
    });
    defineProperty(Math, 'round', function round(x) {
      var floor = _floor(x);
      var ceil = floor === -1 ? -0 : floor + 1;
      return x - floor < 0.5 ? floor : ceil;
    }, !roundHandlesBoundaryConditions || !roundDoesNotIncreaseIntegers);
    Value.preserveToString(Math.round, origMathRound);
  
    var origImul = Math.imul;
    if (Math.imul(0xffffffff, 5) !== -5) {
      // Safari 6.1, at least, reports "0" for this value
      Math.imul = MathShims.imul;
      Value.preserveToString(Math.imul, origImul);
    }
    if (Math.imul.length !== 2) {
      // Safari 8.0.4 has a length of 1
      // fixed in https://bugs.webkit.org/show_bug.cgi?id=143658
      overrideNative(Math, 'imul', function imul(x, y) {
        return ES.Call(origImul, Math, arguments);
      });
    }
  
    // Promises
    // Simplest possible implementation; use a 3rd-party library if you
    // want the best possible speed and/or long stack traces.
    var PromiseShim = (function () {
      var setTimeout = globals.setTimeout;
      // some environments don't have setTimeout - no way to shim here.
      if (typeof setTimeout !== 'function' && typeof setTimeout !== 'object') { return; }
  
      ES.IsPromise = function (promise) {
        if (!ES.TypeIsObject(promise)) {
          return false;
        }
        if (typeof promise._promise === 'undefined') {
          return false; // uninitialized, or missing our hidden field.
        }
        return true;
      };
  
      // "PromiseCapability" in the spec is what most promise implementations
      // call a "deferred".
      var PromiseCapability = function (C) {
        if (!ES.IsConstructor(C)) {
          throw new TypeError('Bad promise constructor');
        }
        var capability = this;
        var resolver = function (resolve, reject) {
          if (capability.resolve !== void 0 || capability.reject !== void 0) {
            throw new TypeError('Bad Promise implementation!');
          }
          capability.resolve = resolve;
          capability.reject = reject;
        };
        // Initialize fields to inform optimizers about the object shape.
        capability.resolve = void 0;
        capability.reject = void 0;
        capability.promise = new C(resolver);
        if (!(ES.IsCallable(capability.resolve) && ES.IsCallable(capability.reject))) {
          throw new TypeError('Bad promise constructor');
        }
      };
  
      // find an appropriate setImmediate-alike
      var makeZeroTimeout;
      /*global window */
      if (typeof window !== 'undefined' && ES.IsCallable(window.postMessage)) {
        makeZeroTimeout = function () {
          // from http://dbaron.org/log/20100309-faster-timeouts
          var timeouts = [];
          var messageName = 'zero-timeout-message';
          var setZeroTimeout = function (fn) {
            _push(timeouts, fn);
            window.postMessage(messageName, '*');
          };
          var handleMessage = function (event) {
            if (event.source === window && event.data === messageName) {
              event.stopPropagation();
              if (timeouts.length === 0) { return; }
              var fn = _shift(timeouts);
              fn();
            }
          };
          window.addEventListener('message', handleMessage, true);
          return setZeroTimeout;
        };
      }
      var makePromiseAsap = function () {
        // An efficient task-scheduler based on a pre-existing Promise
        // implementation, which we can use even if we override the
        // global Promise below (in order to workaround bugs)
        // https://github.com/Raynos/observ-hash/issues/2#issuecomment-35857671
        var P = globals.Promise;
        var pr = P && P.resolve && P.resolve();
        return pr && function (task) {
          return pr.then(task);
        };
      };
      /*global process */
      /* jscs:disable disallowMultiLineTernary */
      var enqueue = ES.IsCallable(globals.setImmediate) ?
        globals.setImmediate :
        typeof process === 'object' && process.nextTick ? process.nextTick : makePromiseAsap() ||
        (ES.IsCallable(makeZeroTimeout) ? makeZeroTimeout() : function (task) { setTimeout(task, 0); }); // fallback
      /* jscs:enable disallowMultiLineTernary */
  
      // Constants for Promise implementation
      var PROMISE_IDENTITY = function (x) { return x; };
      var PROMISE_THROWER = function (e) { throw e; };
      var PROMISE_PENDING = 0;
      var PROMISE_FULFILLED = 1;
      var PROMISE_REJECTED = 2;
      // We store fulfill/reject handlers and capabilities in a single array.
      var PROMISE_FULFILL_OFFSET = 0;
      var PROMISE_REJECT_OFFSET = 1;
      var PROMISE_CAPABILITY_OFFSET = 2;
      // This is used in an optimization for chaining promises via then.
      var PROMISE_FAKE_CAPABILITY = {};
  
      var enqueuePromiseReactionJob = function (handler, capability, argument) {
        enqueue(function () {
          promiseReactionJob(handler, capability, argument);
        });
      };
  
      var promiseReactionJob = function (handler, promiseCapability, argument) {
        var handlerResult, f;
        if (promiseCapability === PROMISE_FAKE_CAPABILITY) {
          // Fast case, when we don't actually need to chain through to a
          // (real) promiseCapability.
          return handler(argument);
        }
        try {
          handlerResult = handler(argument);
          f = promiseCapability.resolve;
        } catch (e) {
          handlerResult = e;
          f = promiseCapability.reject;
        }
        f(handlerResult);
      };
  
      var fulfillPromise = function (promise, value) {
        var _promise = promise._promise;
        var length = _promise.reactionLength;
        if (length > 0) {
          enqueuePromiseReactionJob(
            _promise.fulfillReactionHandler0,
            _promise.reactionCapability0,
            value
          );
          _promise.fulfillReactionHandler0 = void 0;
          _promise.rejectReactions0 = void 0;
          _promise.reactionCapability0 = void 0;
          if (length > 1) {
            for (var i = 1, idx = 0; i < length; i++, idx += 3) {
              enqueuePromiseReactionJob(
                _promise[idx + PROMISE_FULFILL_OFFSET],
                _promise[idx + PROMISE_CAPABILITY_OFFSET],
                value
              );
              promise[idx + PROMISE_FULFILL_OFFSET] = void 0;
              promise[idx + PROMISE_REJECT_OFFSET] = void 0;
              promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;
            }
          }
        }
        _promise.result = value;
        _promise.state = PROMISE_FULFILLED;
        _promise.reactionLength = 0;
      };
  
      var rejectPromise = function (promise, reason) {
        var _promise = promise._promise;
        var length = _promise.reactionLength;
        if (length > 0) {
          enqueuePromiseReactionJob(
            _promise.rejectReactionHandler0,
            _promise.reactionCapability0,
            reason
          );
          _promise.fulfillReactionHandler0 = void 0;
          _promise.rejectReactions0 = void 0;
          _promise.reactionCapability0 = void 0;
          if (length > 1) {
            for (var i = 1, idx = 0; i < length; i++, idx += 3) {
              enqueuePromiseReactionJob(
                _promise[idx + PROMISE_REJECT_OFFSET],
                _promise[idx + PROMISE_CAPABILITY_OFFSET],
                reason
              );
              promise[idx + PROMISE_FULFILL_OFFSET] = void 0;
              promise[idx + PROMISE_REJECT_OFFSET] = void 0;
              promise[idx + PROMISE_CAPABILITY_OFFSET] = void 0;
            }
          }
        }
        _promise.result = reason;
        _promise.state = PROMISE_REJECTED;
        _promise.reactionLength = 0;
      };
  
      var createResolvingFunctions = function (promise) {
        var alreadyResolved = false;
        var resolve = function (resolution) {
          var then;
          if (alreadyResolved) { return; }
          alreadyResolved = true;
          if (resolution === promise) {
            return rejectPromise(promise, new TypeError('Self resolution'));
          }
          if (!ES.TypeIsObject(resolution)) {
            return fulfillPromise(promise, resolution);
          }
          try {
            then = resolution.then;
          } catch (e) {
            return rejectPromise(promise, e);
          }
          if (!ES.IsCallable(then)) {
            return fulfillPromise(promise, resolution);
          }
          enqueue(function () {
            promiseResolveThenableJob(promise, resolution, then);
          });
        };
        var reject = function (reason) {
          if (alreadyResolved) { return; }
          alreadyResolved = true;
          return rejectPromise(promise, reason);
        };
        return { resolve: resolve, reject: reject };
      };
  
      var optimizedThen = function (then, thenable, resolve, reject) {
        // Optimization: since we discard the result, we can pass our
        // own then implementation a special hint to let it know it
        // doesn't have to create it.  (The PROMISE_FAKE_CAPABILITY
        // object is local to this implementation and unforgeable outside.)
        if (then === Promise$prototype$then) {
          _call(then, thenable, resolve, reject, PROMISE_FAKE_CAPABILITY);
        } else {
          _call(then, thenable, resolve, reject);
        }
      };
      var promiseResolveThenableJob = function (promise, thenable, then) {
        var resolvingFunctions = createResolvingFunctions(promise);
        var resolve = resolvingFunctions.resolve;
        var reject = resolvingFunctions.reject;
        try {
          optimizedThen(then, thenable, resolve, reject);
        } catch (e) {
          reject(e);
        }
      };
  
      var Promise$prototype, Promise$prototype$then;
      var Promise = (function () {
        var PromiseShim = function Promise(resolver) {
          if (!(this instanceof PromiseShim)) {
            throw new TypeError('Constructor Promise requires "new"');
          }
          if (this && this._promise) {
            throw new TypeError('Bad construction');
          }
          // see https://bugs.ecmascript.org/show_bug.cgi?id=2482
          if (!ES.IsCallable(resolver)) {
            throw new TypeError('not a valid resolver');
          }
          var promise = emulateES6construct(this, PromiseShim, Promise$prototype, {
            _promise: {
              result: void 0,
              state: PROMISE_PENDING,
              // The first member of the "reactions" array is inlined here,
              // since most promises only have one reaction.
              // We've also exploded the 'reaction' object to inline the
              // "handler" and "capability" fields, since both fulfill and
              // reject reactions share the same capability.
              reactionLength: 0,
              fulfillReactionHandler0: void 0,
              rejectReactionHandler0: void 0,
              reactionCapability0: void 0
            }
          });
          var resolvingFunctions = createResolvingFunctions(promise);
          var reject = resolvingFunctions.reject;
          try {
            resolver(resolvingFunctions.resolve, reject);
          } catch (e) {
            reject(e);
          }
          return promise;
        };
        return PromiseShim;
      }());
      Promise$prototype = Promise.prototype;
  
      var _promiseAllResolver = function (index, values, capability, remaining) {
        var alreadyCalled = false;
        return function (x) {
          if (alreadyCalled) { return; }
          alreadyCalled = true;
          values[index] = x;
          if ((--remaining.count) === 0) {
            var resolve = capability.resolve;
            resolve(values); // call w/ this===undefined
          }
        };
      };
  
      var performPromiseAll = function (iteratorRecord, C, resultCapability) {
        var it = iteratorRecord.iterator;
        var values = [];
        var remaining = { count: 1 };
        var next, nextValue;
        var index = 0;
        while (true) {
          try {
            next = ES.IteratorStep(it);
            if (next === false) {
              iteratorRecord.done = true;
              break;
            }
            nextValue = next.value;
          } catch (e) {
            iteratorRecord.done = true;
            throw e;
          }
          values[index] = void 0;
          var nextPromise = C.resolve(nextValue);
          var resolveElement = _promiseAllResolver(
            index,
            values,
            resultCapability,
            remaining
          );
          remaining.count += 1;
          optimizedThen(nextPromise.then, nextPromise, resolveElement, resultCapability.reject);
          index += 1;
        }
        if ((--remaining.count) === 0) {
          var resolve = resultCapability.resolve;
          resolve(values); // call w/ this===undefined
        }
        return resultCapability.promise;
      };
  
      var performPromiseRace = function (iteratorRecord, C, resultCapability) {
        var it = iteratorRecord.iterator;
        var next, nextValue, nextPromise;
        while (true) {
          try {
            next = ES.IteratorStep(it);
            if (next === false) {
              // NOTE: If iterable has no items, resulting promise will never
              // resolve; see:
              // https://github.com/domenic/promises-unwrapping/issues/75
              // https://bugs.ecmascript.org/show_bug.cgi?id=2515
              iteratorRecord.done = true;
              break;
            }
            nextValue = next.value;
          } catch (e) {
            iteratorRecord.done = true;
            throw e;
          }
          nextPromise = C.resolve(nextValue);
          optimizedThen(nextPromise.then, nextPromise, resultCapability.resolve, resultCapability.reject);
        }
        return resultCapability.promise;
      };
  
      defineProperties(Promise, {
        all: function all(iterable) {
          var C = this;
          if (!ES.TypeIsObject(C)) {
            throw new TypeError('Promise is not object');
          }
          var capability = new PromiseCapability(C);
          var iterator, iteratorRecord;
          try {
            iterator = ES.GetIterator(iterable);
            iteratorRecord = { iterator: iterator, done: false };
            return performPromiseAll(iteratorRecord, C, capability);
          } catch (e) {
            var exception = e;
            if (iteratorRecord && !iteratorRecord.done) {
              try {
                ES.IteratorClose(iterator, true);
              } catch (ee) {
                exception = ee;
              }
            }
            var reject = capability.reject;
            reject(exception);
            return capability.promise;
          }
        },
  
        race: function race(iterable) {
          var C = this;
          if (!ES.TypeIsObject(C)) {
            throw new TypeError('Promise is not object');
          }
          var capability = new PromiseCapability(C);
          var iterator, iteratorRecord;
          try {
            iterator = ES.GetIterator(iterable);
            iteratorRecord = { iterator: iterator, done: false };
            return performPromiseRace(iteratorRecord, C, capability);
          } catch (e) {
            var exception = e;
            if (iteratorRecord && !iteratorRecord.done) {
              try {
                ES.IteratorClose(iterator, true);
              } catch (ee) {
                exception = ee;
              }
            }
            var reject = capability.reject;
            reject(exception);
            return capability.promise;
          }
        },
  
        reject: function reject(reason) {
          var C = this;
          if (!ES.TypeIsObject(C)) {
            throw new TypeError('Bad promise constructor');
          }
          var capability = new PromiseCapability(C);
          var rejectFunc = capability.reject;
          rejectFunc(reason); // call with this===undefined
          return capability.promise;
        },
  
        resolve: function resolve(v) {
          // See https://esdiscuss.org/topic/fixing-promise-resolve for spec
          var C = this;
          if (!ES.TypeIsObject(C)) {
            throw new TypeError('Bad promise constructor');
          }
          if (ES.IsPromise(v)) {
            var constructor = v.constructor;
            if (constructor === C) {
              return v;
            }
          }
          var capability = new PromiseCapability(C);
          var resolveFunc = capability.resolve;
          resolveFunc(v); // call with this===undefined
          return capability.promise;
        }
      });
  
      defineProperties(Promise$prototype, {
        'catch': function (onRejected) {
          return this.then(null, onRejected);
        },
  
        then: function then(onFulfilled, onRejected) {
          var promise = this;
          if (!ES.IsPromise(promise)) { throw new TypeError('not a promise'); }
          var C = ES.SpeciesConstructor(promise, Promise);
          var resultCapability;
          var returnValueIsIgnored = arguments.length > 2 && arguments[2] === PROMISE_FAKE_CAPABILITY;
          if (returnValueIsIgnored && C === Promise) {
            resultCapability = PROMISE_FAKE_CAPABILITY;
          } else {
            resultCapability = new PromiseCapability(C);
          }
          // PerformPromiseThen(promise, onFulfilled, onRejected, resultCapability)
          // Note that we've split the 'reaction' object into its two
          // components, "capabilities" and "handler"
          // "capabilities" is always equal to `resultCapability`
          var fulfillReactionHandler = ES.IsCallable(onFulfilled) ? onFulfilled : PROMISE_IDENTITY;
          var rejectReactionHandler = ES.IsCallable(onRejected) ? onRejected : PROMISE_THROWER;
          var _promise = promise._promise;
          var value;
          if (_promise.state === PROMISE_PENDING) {
            if (_promise.reactionLength === 0) {
              _promise.fulfillReactionHandler0 = fulfillReactionHandler;
              _promise.rejectReactionHandler0 = rejectReactionHandler;
              _promise.reactionCapability0 = resultCapability;
            } else {
              var idx = 3 * (_promise.reactionLength - 1);
              _promise[idx + PROMISE_FULFILL_OFFSET] = fulfillReactionHandler;
              _promise[idx + PROMISE_REJECT_OFFSET] = rejectReactionHandler;
              _promise[idx + PROMISE_CAPABILITY_OFFSET] = resultCapability;
            }
            _promise.reactionLength += 1;
          } else if (_promise.state === PROMISE_FULFILLED) {
            value = _promise.result;
            enqueuePromiseReactionJob(
              fulfillReactionHandler,
              resultCapability,
              value
            );
          } else if (_promise.state === PROMISE_REJECTED) {
            value = _promise.result;
            enqueuePromiseReactionJob(
              rejectReactionHandler,
              resultCapability,
              value
            );
          } else {
            throw new TypeError('unexpected Promise state');
          }
          return resultCapability.promise;
        }
      });
      // This helps the optimizer by ensuring that methods which take
      // capabilities aren't polymorphic.
      PROMISE_FAKE_CAPABILITY = new PromiseCapability(Promise);
      Promise$prototype$then = Promise$prototype.then;
  
      return Promise;
    }());
  
    // Chrome's native Promise has extra methods that it shouldn't have. Let's remove them.
    if (globals.Promise) {
      delete globals.Promise.accept;
      delete globals.Promise.defer;
      delete globals.Promise.prototype.chain;
    }
  
    if (typeof PromiseShim === 'function') {
      // export the Promise constructor.
      defineProperties(globals, { Promise: PromiseShim });
      // In Chrome 33 (and thereabouts) Promise is defined, but the
      // implementation is buggy in a number of ways.  Let's check subclassing
      // support to see if we have a buggy implementation.
      var promiseSupportsSubclassing = supportsSubclassing(globals.Promise, function (S) {
        return S.resolve(42).then(function () {}) instanceof S;
      });
      var promiseIgnoresNonFunctionThenCallbacks = !throwsError(function () {
        globals.Promise.reject(42).then(null, 5).then(null, noop);
      });
      var promiseRequiresObjectContext = throwsError(function () { globals.Promise.call(3, noop); });
      // Promise.resolve() was errata'ed late in the ES6 process.
      // See: https://bugzilla.mozilla.org/show_bug.cgi?id=1170742
      //      https://code.google.com/p/v8/issues/detail?id=4161
      // It serves as a proxy for a number of other bugs in early Promise
      // implementations.
      var promiseResolveBroken = (function (Promise) {
        var p = Promise.resolve(5);
        p.constructor = {};
        var p2 = Promise.resolve(p);
        try {
          p2.then(null, noop).then(null, noop); // avoid "uncaught rejection" warnings in console
        } catch (e) {
          return true; // v8 native Promises break here https://code.google.com/p/chromium/issues/detail?id=575314
        }
        return p === p2; // This *should* be false!
      }(globals.Promise));
  
      // Chrome 46 (probably older too) does not retrieve a thenable's .then synchronously
      var getsThenSynchronously = supportsDescriptors && (function () {
        var count = 0;
        // eslint-disable-next-line getter-return
        var thenable = Object.defineProperty({}, 'then', { get: function () { count += 1; } });
        Promise.resolve(thenable);
        return count === 1;
      }());
  
      var BadResolverPromise = function BadResolverPromise(executor) {
        var p = new Promise(executor);
        executor(3, function () {});
        this.then = p.then;
        this.constructor = BadResolverPromise;
      };
      BadResolverPromise.prototype = Promise.prototype;
      BadResolverPromise.all = Promise.all;
      // Chrome Canary 49 (probably older too) has some implementation bugs
      var hasBadResolverPromise = valueOrFalseIfThrows(function () {
        return !!BadResolverPromise.all([1, 2]);
      });
  
      if (!promiseSupportsSubclassing || !promiseIgnoresNonFunctionThenCallbacks ||
          !promiseRequiresObjectContext || promiseResolveBroken ||
          !getsThenSynchronously || hasBadResolverPromise) {
        /* globals Promise: true */
        /* eslint-disable no-undef, no-global-assign */
        /* jshint -W020 */
        Promise = PromiseShim;
        /* jshint +W020 */
        /* eslint-enable no-undef, no-global-assign */
        /* globals Promise: false */
        overrideNative(globals, 'Promise', PromiseShim);
      }
      if (Promise.all.length !== 1) {
        var origAll = Promise.all;
        overrideNative(Promise, 'all', function all(iterable) {
          return ES.Call(origAll, this, arguments);
        });
      }
      if (Promise.race.length !== 1) {
        var origRace = Promise.race;
        overrideNative(Promise, 'race', function race(iterable) {
          return ES.Call(origRace, this, arguments);
        });
      }
      if (Promise.resolve.length !== 1) {
        var origResolve = Promise.resolve;
        overrideNative(Promise, 'resolve', function resolve(x) {
          return ES.Call(origResolve, this, arguments);
        });
      }
      if (Promise.reject.length !== 1) {
        var origReject = Promise.reject;
        overrideNative(Promise, 'reject', function reject(r) {
          return ES.Call(origReject, this, arguments);
        });
      }
      ensureEnumerable(Promise, 'all');
      ensureEnumerable(Promise, 'race');
      ensureEnumerable(Promise, 'resolve');
      ensureEnumerable(Promise, 'reject');
      addDefaultSpecies(Promise);
    }
  
    // Map and Set require a true ES5 environment
    // Their fast path also requires that the environment preserve
    // property insertion order, which is not guaranteed by the spec.
    var testOrder = function (a) {
      var b = keys(_reduce(a, function (o, k) {
        o[k] = true;
        return o;
      }, {}));
      return a.join(':') === b.join(':');
    };
    var preservesInsertionOrder = testOrder(['z', 'a', 'bb']);
    // some engines (eg, Chrome) only preserve insertion order for string keys
    var preservesNumericInsertionOrder = testOrder(['z', 1, 'a', '3', 2]);
  
    if (supportsDescriptors) {
  
      var fastkey = function fastkey(key, skipInsertionOrderCheck) {
        if (!skipInsertionOrderCheck && !preservesInsertionOrder) {
          return null;
        }
        if (isNullOrUndefined(key)) {
          return '^' + ES.ToString(key);
        } else if (typeof key === 'string') {
          return '$' + key;
        } else if (typeof key === 'number') {
          // note that -0 will get coerced to "0" when used as a property key
          if (!preservesNumericInsertionOrder) {
            return 'n' + key;
          }
          return key;
        } else if (typeof key === 'boolean') {
          return 'b' + key;
        }
        return null;
      };
  
      var emptyObject = function emptyObject() {
        // accomodate some older not-quite-ES5 browsers
        return Object.create ? Object.create(null) : {};
      };
  
      var addIterableToMap = function addIterableToMap(MapConstructor, map, iterable) {
        if (isArray(iterable) || Type.string(iterable)) {
          _forEach(iterable, function (entry) {
            if (!ES.TypeIsObject(entry)) {
              throw new TypeError('Iterator value ' + entry + ' is not an entry object');
            }
            map.set(entry[0], entry[1]);
          });
        } else if (iterable instanceof MapConstructor) {
          _call(MapConstructor.prototype.forEach, iterable, function (value, key) {
            map.set(key, value);
          });
        } else {
          var iter, adder;
          if (!isNullOrUndefined(iterable)) {
            adder = map.set;
            if (!ES.IsCallable(adder)) { throw new TypeError('bad map'); }
            iter = ES.GetIterator(iterable);
          }
          if (typeof iter !== 'undefined') {
            while (true) {
              var next = ES.IteratorStep(iter);
              if (next === false) { break; }
              var nextItem = next.value;
              try {
                if (!ES.TypeIsObject(nextItem)) {
                  throw new TypeError('Iterator value ' + nextItem + ' is not an entry object');
                }
                _call(adder, map, nextItem[0], nextItem[1]);
              } catch (e) {
                ES.IteratorClose(iter, true);
                throw e;
              }
            }
          }
        }
      };
      var addIterableToSet = function addIterableToSet(SetConstructor, set, iterable) {
        if (isArray(iterable) || Type.string(iterable)) {
          _forEach(iterable, function (value) {
            set.add(value);
          });
        } else if (iterable instanceof SetConstructor) {
          _call(SetConstructor.prototype.forEach, iterable, function (value) {
            set.add(value);
          });
        } else {
          var iter, adder;
          if (!isNullOrUndefined(iterable)) {
            adder = set.add;
            if (!ES.IsCallable(adder)) { throw new TypeError('bad set'); }
            iter = ES.GetIterator(iterable);
          }
          if (typeof iter !== 'undefined') {
            while (true) {
              var next = ES.IteratorStep(iter);
              if (next === false) { break; }
              var nextValue = next.value;
              try {
                _call(adder, set, nextValue);
              } catch (e) {
                ES.IteratorClose(iter, true);
                throw e;
              }
            }
          }
        }
      };
  
      var collectionShims = {
        Map: (function () {
  
          var empty = {};
  
          var MapEntry = function MapEntry(key, value) {
            this.key = key;
            this.value = value;
            this.next = null;
            this.prev = null;
          };
  
          MapEntry.prototype.isRemoved = function isRemoved() {
            return this.key === empty;
          };
  
          var isMap = function isMap(map) {
            return !!map._es6map;
          };
  
          var requireMapSlot = function requireMapSlot(map, method) {
            if (!ES.TypeIsObject(map) || !isMap(map)) {
              throw new TypeError('Method Map.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(map));
            }
          };
  
          var MapIterator = function MapIterator(map, kind) {
            requireMapSlot(map, '[[MapIterator]]');
            this.head = map._head;
            this.i = this.head;
            this.kind = kind;
          };
  
          MapIterator.prototype = {
            isMapIterator: true,
            next: function next() {
              if (!this.isMapIterator) {
                throw new TypeError('Not a MapIterator');
              }
              var i = this.i;
              var kind = this.kind;
              var head = this.head;
              if (typeof this.i === 'undefined') {
                return iteratorResult();
              }
              while (i.isRemoved() && i !== head) {
                // back up off of removed entries
                i = i.prev;
              }
              // advance to next unreturned element.
              var result;
              while (i.next !== head) {
                i = i.next;
                if (!i.isRemoved()) {
                  if (kind === 'key') {
                    result = i.key;
                  } else if (kind === 'value') {
                    result = i.value;
                  } else {
                    result = [i.key, i.value];
                  }
                  this.i = i;
                  return iteratorResult(result);
                }
              }
              // once the iterator is done, it is done forever.
              this.i = void 0;
              return iteratorResult();
            }
          };
          addIterator(MapIterator.prototype);
  
          var Map$prototype;
          var MapShim = function Map() {
            if (!(this instanceof Map)) {
              throw new TypeError('Constructor Map requires "new"');
            }
            if (this && this._es6map) {
              throw new TypeError('Bad construction');
            }
            var map = emulateES6construct(this, Map, Map$prototype, {
              _es6map: true,
              _head: null,
              _map: OrigMap ? new OrigMap() : null,
              _size: 0,
              _storage: emptyObject()
            });
  
            var head = new MapEntry(null, null);
            // circular doubly-linked list.
            /* eslint no-multi-assign: 1 */
            head.next = head.prev = head;
            map._head = head;
  
            // Optionally initialize map from iterable
            if (arguments.length > 0) {
              addIterableToMap(Map, map, arguments[0]);
            }
            return map;
          };
          Map$prototype = MapShim.prototype;
  
          Value.getter(Map$prototype, 'size', function () {
            if (typeof this._size === 'undefined') {
              throw new TypeError('size method called on incompatible Map');
            }
            return this._size;
          });
  
          defineProperties(Map$prototype, {
            get: function get(key) {
              requireMapSlot(this, 'get');
              var entry;
              var fkey = fastkey(key, true);
              if (fkey !== null) {
                // fast O(1) path
                entry = this._storage[fkey];
                if (entry) {
                  return entry.value;
                } else {
                  return;
                }
              }
              if (this._map) {
                // fast object key path
                entry = origMapGet.call(this._map, key);
                if (entry) {
                  return entry.value;
                } else {
                  return;
                }
              }
              var head = this._head;
              var i = head;
              while ((i = i.next) !== head) {
                if (ES.SameValueZero(i.key, key)) {
                  return i.value;
                }
              }
            },
  
            has: function has(key) {
              requireMapSlot(this, 'has');
              var fkey = fastkey(key, true);
              if (fkey !== null) {
                // fast O(1) path
                return typeof this._storage[fkey] !== 'undefined';
              }
              if (this._map) {
                // fast object key path
                return origMapHas.call(this._map, key);
              }
              var head = this._head;
              var i = head;
              while ((i = i.next) !== head) {
                if (ES.SameValueZero(i.key, key)) {
                  return true;
                }
              }
              return false;
            },
  
            set: function set(key, value) {
              requireMapSlot(this, 'set');
              var head = this._head;
              var i = head;
              var entry;
              var fkey = fastkey(key, true);
              if (fkey !== null) {
                // fast O(1) path
                if (typeof this._storage[fkey] !== 'undefined') {
                  this._storage[fkey].value = value;
                  return this;
                } else {
                  entry = this._storage[fkey] = new MapEntry(key, value); /* eslint no-multi-assign: 1 */
                  i = head.prev;
                  // fall through
                }
              } else if (this._map) {
                // fast object key path
                if (origMapHas.call(this._map, key)) {
                  origMapGet.call(this._map, key).value = value;
                } else {
                  entry = new MapEntry(key, value);
                  origMapSet.call(this._map, key, entry);
                  i = head.prev;
                  // fall through
                }
              }
              while ((i = i.next) !== head) {
                if (ES.SameValueZero(i.key, key)) {
                  i.value = value;
                  return this;
                }
              }
              entry = entry || new MapEntry(key, value);
              if (ES.SameValue(-0, key)) {
                entry.key = +0; // coerce -0 to +0 in entry
              }
              entry.next = this._head;
              entry.prev = this._head.prev;
              entry.prev.next = entry;
              entry.next.prev = entry;
              this._size += 1;
              return this;
            },
  
            'delete': function (key) {
              requireMapSlot(this, 'delete');
              var head = this._head;
              var i = head;
              var fkey = fastkey(key, true);
              if (fkey !== null) {
                // fast O(1) path
                if (typeof this._storage[fkey] === 'undefined') {
                  return false;
                }
                i = this._storage[fkey].prev;
                delete this._storage[fkey];
                // fall through
              } else if (this._map) {
                // fast object key path
                if (!origMapHas.call(this._map, key)) {
                  return false;
                }
                i = origMapGet.call(this._map, key).prev;
                origMapDelete.call(this._map, key);
                // fall through
              }
              while ((i = i.next) !== head) {
                if (ES.SameValueZero(i.key, key)) {
                  i.key = empty;
                  i.value = empty;
                  i.prev.next = i.next;
                  i.next.prev = i.prev;
                  this._size -= 1;
                  return true;
                }
              }
              return false;
            },
  
            clear: function clear() {
              /* eslint no-multi-assign: 1 */
              requireMapSlot(this, 'clear');
              this._map = OrigMap ? new OrigMap() : null;
              this._size = 0;
              this._storage = emptyObject();
              var head = this._head;
              var i = head;
              var p = i.next;
              while ((i = p) !== head) {
                i.key = empty;
                i.value = empty;
                p = i.next;
                i.next = i.prev = head;
              }
              head.next = head.prev = head;
            },
  
            keys: function keys() {
              requireMapSlot(this, 'keys');
              return new MapIterator(this, 'key');
            },
  
            values: function values() {
              requireMapSlot(this, 'values');
              return new MapIterator(this, 'value');
            },
  
            entries: function entries() {
              requireMapSlot(this, 'entries');
              return new MapIterator(this, 'key+value');
            },
  
            forEach: function forEach(callback) {
              requireMapSlot(this, 'forEach');
              var context = arguments.length > 1 ? arguments[1] : null;
              var it = this.entries();
              for (var entry = it.next(); !entry.done; entry = it.next()) {
                if (context) {
                  _call(callback, context, entry.value[1], entry.value[0], this);
                } else {
                  callback(entry.value[1], entry.value[0], this);
                }
              }
            }
          });
          addIterator(Map$prototype, Map$prototype.entries);
  
          return MapShim;
        }()),
  
        Set: (function () {
          var isSet = function isSet(set) {
            return set._es6set && typeof set._storage !== 'undefined';
          };
          var requireSetSlot = function requireSetSlot(set, method) {
            if (!ES.TypeIsObject(set) || !isSet(set)) {
              // https://github.com/paulmillr/es6-shim/issues/176
              throw new TypeError('Set.prototype.' + method + ' called on incompatible receiver ' + ES.ToString(set));
            }
          };
  
          // Creating a Map is expensive.  To speed up the common case of
          // Sets containing only string or numeric keys, we use an object
          // as backing storage and lazily create a full Map only when
          // required.
          var Set$prototype;
          var SetShim = function Set() {
            if (!(this instanceof Set)) {
              throw new TypeError('Constructor Set requires "new"');
            }
            if (this && this._es6set) {
              throw new TypeError('Bad construction');
            }
            var set = emulateES6construct(this, Set, Set$prototype, {
              _es6set: true,
              '[[SetData]]': null,
              _storage: emptyObject()
            });
            if (!set._es6set) {
              throw new TypeError('bad set');
            }
  
            // Optionally initialize Set from iterable
            if (arguments.length > 0) {
              addIterableToSet(Set, set, arguments[0]);
            }
            return set;
          };
          Set$prototype = SetShim.prototype;
  
          var decodeKey = function (key) {
            var k = key;
            if (k === '^null') {
              return null;
            } else if (k === '^undefined') {
              return void 0;
            } else {
              var first = k.charAt(0);
              if (first === '$') {
                return _strSlice(k, 1);
              } else if (first === 'n') {
                return +_strSlice(k, 1);
              } else if (first === 'b') {
                return k === 'btrue';
              }
            }
            return +k;
          };
          // Switch from the object backing storage to a full Map.
          var ensureMap = function ensureMap(set) {
            if (!set['[[SetData]]']) {
              var m = new collectionShims.Map();
              set['[[SetData]]'] = m;
              _forEach(keys(set._storage), function (key) {
                var k = decodeKey(key);
                m.set(k, k);
              });
              set['[[SetData]]'] = m;
            }
            set._storage = null; // free old backing storage
          };
  
          Value.getter(SetShim.prototype, 'size', function () {
            requireSetSlot(this, 'size');
            if (this._storage) {
              return keys(this._storage).length;
            }
            ensureMap(this);
            return this['[[SetData]]'].size;
          });
  
          defineProperties(SetShim.prototype, {
            has: function has(key) {
              requireSetSlot(this, 'has');
              var fkey;
              if (this._storage && (fkey = fastkey(key)) !== null) {
                return !!this._storage[fkey];
              }
              ensureMap(this);
              return this['[[SetData]]'].has(key);
            },
  
            add: function add(key) {
              requireSetSlot(this, 'add');
              var fkey;
              if (this._storage && (fkey = fastkey(key)) !== null) {
                this._storage[fkey] = true;
                return this;
              }
              ensureMap(this);
              this['[[SetData]]'].set(key, key);
              return this;
            },
  
            'delete': function (key) {
              requireSetSlot(this, 'delete');
              var fkey;
              if (this._storage && (fkey = fastkey(key)) !== null) {
                var hasFKey = _hasOwnProperty(this._storage, fkey);
                return (delete this._storage[fkey]) && hasFKey;
              }
              ensureMap(this);
              return this['[[SetData]]']['delete'](key);
            },
  
            clear: function clear() {
              requireSetSlot(this, 'clear');
              if (this._storage) {
                this._storage = emptyObject();
              }
              if (this['[[SetData]]']) {
                this['[[SetData]]'].clear();
              }
            },
  
            values: function values() {
              requireSetSlot(this, 'values');
              ensureMap(this);
              return new SetIterator(this['[[SetData]]'].values());
            },
  
            entries: function entries() {
              requireSetSlot(this, 'entries');
              ensureMap(this);
              return new SetIterator(this['[[SetData]]'].entries());
            },
  
            forEach: function forEach(callback) {
              requireSetSlot(this, 'forEach');
              var context = arguments.length > 1 ? arguments[1] : null;
              var entireSet = this;
              ensureMap(entireSet);
              this['[[SetData]]'].forEach(function (value, key) {
                if (context) {
                  _call(callback, context, key, key, entireSet);
                } else {
                  callback(key, key, entireSet);
                }
              });
            }
          });
          defineProperty(SetShim.prototype, 'keys', SetShim.prototype.values, true);
          addIterator(SetShim.prototype, SetShim.prototype.values);
  
          var SetIterator = function SetIterator(it) {
            this.it = it;
          };
          SetIterator.prototype = {
            isSetIterator: true,
            next: function next() {
              if (!this.isSetIterator) {
                throw new TypeError('Not a SetIterator');
              }
              return this.it.next();
            }
          };
          addIterator(SetIterator.prototype);
  
          return SetShim;
        }())
      };
  
      var isGoogleTranslate = globals.Set && !Set.prototype['delete'] && Set.prototype.remove && Set.prototype.items && Set.prototype.map && Array.isArray(new Set().keys);
      if (isGoogleTranslate) {
        // special-case force removal of wildly invalid Set implementation in Google Translate iframes
        // see https://github.com/paulmillr/es6-shim/issues/438 / https://twitter.com/ljharb/status/849335573114363904
        globals.Set = collectionShims.Set;
      }
      if (globals.Map || globals.Set) {
        // Safari 8, for example, doesn't accept an iterable.
        var mapAcceptsArguments = valueOrFalseIfThrows(function () { return new Map([[1, 2]]).get(1) === 2; });
        if (!mapAcceptsArguments) {
          globals.Map = function Map() {
            if (!(this instanceof Map)) {
              throw new TypeError('Constructor Map requires "new"');
            }
            var m = new OrigMap();
            if (arguments.length > 0) {
              addIterableToMap(Map, m, arguments[0]);
            }
            delete m.constructor;
            Object.setPrototypeOf(m, globals.Map.prototype);
            return m;
          };
          globals.Map.prototype = create(OrigMap.prototype);
          defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);
          Value.preserveToString(globals.Map, OrigMap);
        }
        var testMap = new Map();
        var mapUsesSameValueZero = (function () {
          // Chrome 38-42, node 0.11/0.12, iojs 1/2 also have a bug when the Map has a size > 4
          var m = new Map([[1, 0], [2, 0], [3, 0], [4, 0]]);
          m.set(-0, m);
          return m.get(0) === m && m.get(-0) === m && m.has(0) && m.has(-0);
        }());
        var mapSupportsChaining = testMap.set(1, 2) === testMap;
        if (!mapUsesSameValueZero || !mapSupportsChaining) {
          overrideNative(Map.prototype, 'set', function set(k, v) {
            _call(origMapSet, this, k === 0 ? 0 : k, v);
            return this;
          });
        }
        if (!mapUsesSameValueZero) {
          defineProperties(Map.prototype, {
            get: function get(k) {
              return _call(origMapGet, this, k === 0 ? 0 : k);
            },
            has: function has(k) {
              return _call(origMapHas, this, k === 0 ? 0 : k);
            }
          }, true);
          Value.preserveToString(Map.prototype.get, origMapGet);
          Value.preserveToString(Map.prototype.has, origMapHas);
        }
        var testSet = new Set();
        var setUsesSameValueZero = Set.prototype['delete'] && Set.prototype.add && Set.prototype.has && (function (s) {
          s['delete'](0);
          s.add(-0);
          return !s.has(0);
        }(testSet));
        var setSupportsChaining = testSet.add(1) === testSet;
        if (!setUsesSameValueZero || !setSupportsChaining) {
          var origSetAdd = Set.prototype.add;
          Set.prototype.add = function add(v) {
            _call(origSetAdd, this, v === 0 ? 0 : v);
            return this;
          };
          Value.preserveToString(Set.prototype.add, origSetAdd);
        }
        if (!setUsesSameValueZero) {
          var origSetHas = Set.prototype.has;
          Set.prototype.has = function has(v) {
            return _call(origSetHas, this, v === 0 ? 0 : v);
          };
          Value.preserveToString(Set.prototype.has, origSetHas);
          var origSetDel = Set.prototype['delete'];
          Set.prototype['delete'] = function SetDelete(v) {
            return _call(origSetDel, this, v === 0 ? 0 : v);
          };
          Value.preserveToString(Set.prototype['delete'], origSetDel);
        }
        var mapSupportsSubclassing = supportsSubclassing(globals.Map, function (M) {
          var m = new M([]);
          // Firefox 32 is ok with the instantiating the subclass but will
          // throw when the map is used.
          m.set(42, 42);
          return m instanceof M;
        });
        // without Object.setPrototypeOf, subclassing is not possible
        var mapFailsToSupportSubclassing = Object.setPrototypeOf && !mapSupportsSubclassing;
        var mapRequiresNew = (function () {
          try {
            return !(globals.Map() instanceof globals.Map);
          } catch (e) {
            return e instanceof TypeError;
          }
        }());
        if (globals.Map.length !== 0 || mapFailsToSupportSubclassing || !mapRequiresNew) {
          globals.Map = function Map() {
            if (!(this instanceof Map)) {
              throw new TypeError('Constructor Map requires "new"');
            }
            var m = new OrigMap();
            if (arguments.length > 0) {
              addIterableToMap(Map, m, arguments[0]);
            }
            delete m.constructor;
            Object.setPrototypeOf(m, Map.prototype);
            return m;
          };
          globals.Map.prototype = OrigMap.prototype;
          defineProperty(globals.Map.prototype, 'constructor', globals.Map, true);
          Value.preserveToString(globals.Map, OrigMap);
        }
        var setSupportsSubclassing = supportsSubclassing(globals.Set, function (S) {
          var s = new S([]);
          s.add(42, 42);
          return s instanceof S;
        });
        // without Object.setPrototypeOf, subclassing is not possible
        var setFailsToSupportSubclassing = Object.setPrototypeOf && !setSupportsSubclassing;
        var setRequiresNew = (function () {
          try {
            return !(globals.Set() instanceof globals.Set);
          } catch (e) {
            return e instanceof TypeError;
          }
        }());
        if (globals.Set.length !== 0 || setFailsToSupportSubclassing || !setRequiresNew) {
          var OrigSet = globals.Set;
          globals.Set = function Set() {
            if (!(this instanceof Set)) {
              throw new TypeError('Constructor Set requires "new"');
            }
            var s = new OrigSet();
            if (arguments.length > 0) {
              addIterableToSet(Set, s, arguments[0]);
            }
            delete s.constructor;
            Object.setPrototypeOf(s, Set.prototype);
            return s;
          };
          globals.Set.prototype = OrigSet.prototype;
          defineProperty(globals.Set.prototype, 'constructor', globals.Set, true);
          Value.preserveToString(globals.Set, OrigSet);
        }
        var newMap = new globals.Map();
        var mapIterationThrowsStopIterator = !valueOrFalseIfThrows(function () {
          return newMap.keys().next().done;
        });
        /*
          - In Firefox < 23, Map#size is a function.
          - In all current Firefox, Set#entries/keys/values & Map#clear do not exist
          - https://bugzilla.mozilla.org/show_bug.cgi?id=869996
          - In Firefox 24, Map and Set do not implement forEach
          - In Firefox 25 at least, Map and Set are callable without "new"
        */
        if (
          typeof globals.Map.prototype.clear !== 'function' ||
          new globals.Set().size !== 0 ||
          newMap.size !== 0 ||
          typeof globals.Map.prototype.keys !== 'function' ||
          typeof globals.Set.prototype.keys !== 'function' ||
          typeof globals.Map.prototype.forEach !== 'function' ||
          typeof globals.Set.prototype.forEach !== 'function' ||
          isCallableWithoutNew(globals.Map) ||
          isCallableWithoutNew(globals.Set) ||
          typeof newMap.keys().next !== 'function' || // Safari 8
          mapIterationThrowsStopIterator || // Firefox 25
          !mapSupportsSubclassing
        ) {
          defineProperties(globals, {
            Map: collectionShims.Map,
            Set: collectionShims.Set
          }, true);
        }
  
        if (globals.Set.prototype.keys !== globals.Set.prototype.values) {
          // Fixed in WebKit with https://bugs.webkit.org/show_bug.cgi?id=144190
          defineProperty(globals.Set.prototype, 'keys', globals.Set.prototype.values, true);
        }
  
        // Shim incomplete iterator implementations.
        addIterator(Object.getPrototypeOf((new globals.Map()).keys()));
        addIterator(Object.getPrototypeOf((new globals.Set()).keys()));
  
        if (functionsHaveNames && globals.Set.prototype.has.name !== 'has') {
          // Microsoft Edge v0.11.10074.0 is missing a name on Set#has
          var anonymousSetHas = globals.Set.prototype.has;
          overrideNative(globals.Set.prototype, 'has', function has(key) {
            return _call(anonymousSetHas, this, key);
          });
        }
      }
      defineProperties(globals, collectionShims);
      addDefaultSpecies(globals.Map);
      addDefaultSpecies(globals.Set);
    }
  
    var throwUnlessTargetIsObject = function throwUnlessTargetIsObject(target) {
      if (!ES.TypeIsObject(target)) {
        throw new TypeError('target must be an object');
      }
    };
  
    // Some Reflect methods are basically the same as
    // those on the Object global, except that a TypeError is thrown if
    // target isn't an object. As well as returning a boolean indicating
    // the success of the operation.
    var ReflectShims = {
      // Apply method in a functional form.
      apply: function apply() {
        return ES.Call(ES.Call, null, arguments);
      },
  
      // New operator in a functional form.
      construct: function construct(constructor, args) {
        if (!ES.IsConstructor(constructor)) {
          throw new TypeError('First argument must be a constructor.');
        }
        var newTarget = arguments.length > 2 ? arguments[2] : constructor;
        if (!ES.IsConstructor(newTarget)) {
          throw new TypeError('new.target must be a constructor.');
        }
        return ES.Construct(constructor, args, newTarget, 'internal');
      },
  
      // When deleting a non-existent or configurable property,
      // true is returned.
      // When attempting to delete a non-configurable property,
      // it will return false.
      deleteProperty: function deleteProperty(target, key) {
        throwUnlessTargetIsObject(target);
        if (supportsDescriptors) {
          var desc = Object.getOwnPropertyDescriptor(target, key);
  
          if (desc && !desc.configurable) {
            return false;
          }
        }
  
        // Will return true.
        return delete target[key];
      },
  
      has: function has(target, key) {
        throwUnlessTargetIsObject(target);
        return key in target;
      }
    };
  
    if (Object.getOwnPropertyNames) {
      Object.assign(ReflectShims, {
        // Basically the result of calling the internal [[OwnPropertyKeys]].
        // Concatenating propertyNames and propertySymbols should do the trick.
        // This should continue to work together with a Symbol shim
        // which overrides Object.getOwnPropertyNames and implements
        // Object.getOwnPropertySymbols.
        ownKeys: function ownKeys(target) {
          throwUnlessTargetIsObject(target);
          var keys = Object.getOwnPropertyNames(target);
  
          if (ES.IsCallable(Object.getOwnPropertySymbols)) {
            _pushApply(keys, Object.getOwnPropertySymbols(target));
          }
  
          return keys;
        }
      });
    }
  
    var callAndCatchException = function ConvertExceptionToBoolean(func) {
      return !throwsError(func);
    };
  
    if (Object.preventExtensions) {
      Object.assign(ReflectShims, {
        isExtensible: function isExtensible(target) {
          throwUnlessTargetIsObject(target);
          return Object.isExtensible(target);
        },
        preventExtensions: function preventExtensions(target) {
          throwUnlessTargetIsObject(target);
          return callAndCatchException(function () {
            Object.preventExtensions(target);
          });
        }
      });
    }
  
    if (supportsDescriptors) {
      var internalGet = function get(target, key, receiver) {
        var desc = Object.getOwnPropertyDescriptor(target, key);
  
        if (!desc) {
          var parent = Object.getPrototypeOf(target);
  
          if (parent === null) {
            return void 0;
          }
  
          return internalGet(parent, key, receiver);
        }
  
        if ('value' in desc) {
          return desc.value;
        }
  
        if (desc.get) {
          return ES.Call(desc.get, receiver);
        }
  
        return void 0;
      };
  
      var internalSet = function set(target, key, value, receiver) {
        var desc = Object.getOwnPropertyDescriptor(target, key);
  
        if (!desc) {
          var parent = Object.getPrototypeOf(target);
  
          if (parent !== null) {
            return internalSet(parent, key, value, receiver);
          }
  
          desc = {
            value: void 0,
            writable: true,
            enumerable: true,
            configurable: true
          };
        }
  
        if ('value' in desc) {
          if (!desc.writable) {
            return false;
          }
  
          if (!ES.TypeIsObject(receiver)) {
            return false;
          }
  
          var existingDesc = Object.getOwnPropertyDescriptor(receiver, key);
  
          if (existingDesc) {
            return Reflect.defineProperty(receiver, key, {
              value: value
            });
          } else {
            return Reflect.defineProperty(receiver, key, {
              value: value,
              writable: true,
              enumerable: true,
              configurable: true
            });
          }
        }
  
        if (desc.set) {
          _call(desc.set, receiver, value);
          return true;
        }
  
        return false;
      };
  
      Object.assign(ReflectShims, {
        defineProperty: function defineProperty(target, propertyKey, attributes) {
          throwUnlessTargetIsObject(target);
          return callAndCatchException(function () {
            Object.defineProperty(target, propertyKey, attributes);
          });
        },
  
        getOwnPropertyDescriptor: function getOwnPropertyDescriptor(target, propertyKey) {
          throwUnlessTargetIsObject(target);
          return Object.getOwnPropertyDescriptor(target, propertyKey);
        },
  
        // Syntax in a functional form.
        get: function get(target, key) {
          throwUnlessTargetIsObject(target);
          var receiver = arguments.length > 2 ? arguments[2] : target;
  
          return internalGet(target, key, receiver);
        },
  
        set: function set(target, key, value) {
          throwUnlessTargetIsObject(target);
          var receiver = arguments.length > 3 ? arguments[3] : target;
  
          return internalSet(target, key, value, receiver);
        }
      });
    }
  
    if (Object.getPrototypeOf) {
      var objectDotGetPrototypeOf = Object.getPrototypeOf;
      ReflectShims.getPrototypeOf = function getPrototypeOf(target) {
        throwUnlessTargetIsObject(target);
        return objectDotGetPrototypeOf(target);
      };
    }
  
    if (Object.setPrototypeOf && ReflectShims.getPrototypeOf) {
      var willCreateCircularPrototype = function (object, lastProto) {
        var proto = lastProto;
        while (proto) {
          if (object === proto) {
            return true;
          }
          proto = ReflectShims.getPrototypeOf(proto);
        }
        return false;
      };
  
      Object.assign(ReflectShims, {
        // Sets the prototype of the given object.
        // Returns true on success, otherwise false.
        setPrototypeOf: function setPrototypeOf(object, proto) {
          throwUnlessTargetIsObject(object);
          if (proto !== null && !ES.TypeIsObject(proto)) {
            throw new TypeError('proto must be an object or null');
          }
  
          // If they already are the same, we're done.
          if (proto === Reflect.getPrototypeOf(object)) {
            return true;
          }
  
          // Cannot alter prototype if object not extensible.
          if (Reflect.isExtensible && !Reflect.isExtensible(object)) {
            return false;
          }
  
          // Ensure that we do not create a circular prototype chain.
          if (willCreateCircularPrototype(object, proto)) {
            return false;
          }
  
          Object.setPrototypeOf(object, proto);
  
          return true;
        }
      });
    }
    var defineOrOverrideReflectProperty = function (key, shim) {
      if (!ES.IsCallable(globals.Reflect[key])) {
        defineProperty(globals.Reflect, key, shim);
      } else {
        var acceptsPrimitives = valueOrFalseIfThrows(function () {
          globals.Reflect[key](1);
          globals.Reflect[key](NaN);
          globals.Reflect[key](true);
          return true;
        });
        if (acceptsPrimitives) {
          overrideNative(globals.Reflect, key, shim);
        }
      }
    };
    Object.keys(ReflectShims).forEach(function (key) {
      defineOrOverrideReflectProperty(key, ReflectShims[key]);
    });
    var originalReflectGetProto = globals.Reflect.getPrototypeOf;
    if (functionsHaveNames && originalReflectGetProto && originalReflectGetProto.name !== 'getPrototypeOf') {
      overrideNative(globals.Reflect, 'getPrototypeOf', function getPrototypeOf(target) {
        return _call(originalReflectGetProto, globals.Reflect, target);
      });
    }
    if (globals.Reflect.setPrototypeOf) {
      if (valueOrFalseIfThrows(function () {
        globals.Reflect.setPrototypeOf(1, {});
        return true;
      })) {
        overrideNative(globals.Reflect, 'setPrototypeOf', ReflectShims.setPrototypeOf);
      }
    }
    if (globals.Reflect.defineProperty) {
      if (!valueOrFalseIfThrows(function () {
        var basic = !globals.Reflect.defineProperty(1, 'test', { value: 1 });
        // "extensible" fails on Edge 0.12
        var extensible = typeof Object.preventExtensions !== 'function' || !globals.Reflect.defineProperty(Object.preventExtensions({}), 'test', {});
        return basic && extensible;
      })) {
        overrideNative(globals.Reflect, 'defineProperty', ReflectShims.defineProperty);
      }
    }
    if (globals.Reflect.construct) {
      if (!valueOrFalseIfThrows(function () {
        var F = function F() {};
        return globals.Reflect.construct(function () {}, [], F) instanceof F;
      })) {
        overrideNative(globals.Reflect, 'construct', ReflectShims.construct);
      }
    }
  
    if (String(new Date(NaN)) !== 'Invalid Date') {
      var dateToString = Date.prototype.toString;
      var shimmedDateToString = function toString() {
        var valueOf = +this;
        if (valueOf !== valueOf) {
          return 'Invalid Date';
        }
        return ES.Call(dateToString, this);
      };
      overrideNative(Date.prototype, 'toString', shimmedDateToString);
    }
  
    // Annex B HTML methods
    // http://www.ecma-international.org/ecma-262/6.0/#sec-additional-properties-of-the-string.prototype-object
    var stringHTMLshims = {
      anchor: function anchor(name) { return ES.CreateHTML(this, 'a', 'name', name); },
      big: function big() { return ES.CreateHTML(this, 'big', '', ''); },
      blink: function blink() { return ES.CreateHTML(this, 'blink', '', ''); },
      bold: function bold() { return ES.CreateHTML(this, 'b', '', ''); },
      fixed: function fixed() { return ES.CreateHTML(this, 'tt', '', ''); },
      fontcolor: function fontcolor(color) { return ES.CreateHTML(this, 'font', 'color', color); },
      fontsize: function fontsize(size) { return ES.CreateHTML(this, 'font', 'size', size); },
      italics: function italics() { return ES.CreateHTML(this, 'i', '', ''); },
      link: function link(url) { return ES.CreateHTML(this, 'a', 'href', url); },
      small: function small() { return ES.CreateHTML(this, 'small', '', ''); },
      strike: function strike() { return ES.CreateHTML(this, 'strike', '', ''); },
      sub: function sub() { return ES.CreateHTML(this, 'sub', '', ''); },
      sup: function sub() { return ES.CreateHTML(this, 'sup', '', ''); }
    };
    _forEach(Object.keys(stringHTMLshims), function (key) {
      var method = String.prototype[key];
      var shouldOverwrite = false;
      if (ES.IsCallable(method)) {
        var output = _call(method, '', ' " ');
        var quotesCount = _concat([], output.match(/"/g)).length;
        shouldOverwrite = output !== output.toLowerCase() || quotesCount > 2;
      } else {
        shouldOverwrite = true;
      }
      if (shouldOverwrite) {
        overrideNative(String.prototype, key, stringHTMLshims[key]);
      }
    });
  
    var JSONstringifiesSymbols = (function () {
      // Microsoft Edge v0.12 stringifies Symbols incorrectly
      if (!hasSymbols) { return false; } // Symbols are not supported
      var stringify = typeof JSON === 'object' && typeof JSON.stringify === 'function' ? JSON.stringify : null;
      if (!stringify) { return false; } // JSON.stringify is not supported
      if (typeof stringify(Symbol()) !== 'undefined') { return true; } // Symbols should become `undefined`
      if (stringify([Symbol()]) !== '[null]') { return true; } // Symbols in arrays should become `null`
      var obj = { a: Symbol() };
      obj[Symbol()] = true;
      if (stringify(obj) !== '{}') { return true; } // Symbol-valued keys *and* Symbol-valued properties should be omitted
      return false;
    }());
    var JSONstringifyAcceptsObjectSymbol = valueOrFalseIfThrows(function () {
      // Chrome 45 throws on stringifying object symbols
      if (!hasSymbols) { return true; } // Symbols are not supported
      return JSON.stringify(Object(Symbol())) === '{}' && JSON.stringify([Object(Symbol())]) === '[{}]';
    });
    if (JSONstringifiesSymbols || !JSONstringifyAcceptsObjectSymbol) {
      var origStringify = JSON.stringify;
      overrideNative(JSON, 'stringify', function stringify(value) {
        if (typeof value === 'symbol') { return; }
        var replacer;
        if (arguments.length > 1) {
          replacer = arguments[1];
        }
        var args = [value];
        if (!isArray(replacer)) {
          var replaceFn = ES.IsCallable(replacer) ? replacer : null;
          var wrappedReplacer = function (key, val) {
            var parsedValue = replaceFn ? _call(replaceFn, this, key, val) : val;
            if (typeof parsedValue !== 'symbol') {
              if (Type.symbol(parsedValue)) {
                return assignTo({})(parsedValue);
              } else {
                return parsedValue;
              }
            }
          };
          args.push(wrappedReplacer);
        } else {
          // create wrapped replacer that handles an array replacer?
          args.push(replacer);
        }
        if (arguments.length > 2) {
          args.push(arguments[2]);
        }
        return origStringify.apply(this, args);
      });
    }
  
    return globals;
  }));
  
  /*<sheetbase>*/
  function PolyfillModule() { return  moduleExports || {}; }
  exports.PolyfillModule = PolyfillModule;
  /*</sheetbase>*/