text: define([], function() {
  	'use strict';
  	function isMergeableObject(value) {
  		return isNonNullObject(value) && !isSpecial(value)
  	}
  
  	function isNonNullObject(value) {
  		return !!value && typeof value === 'object'
  	}
  
  	function isSpecial(value) {
  		var stringValue = Object.prototype.toString.call(value)
  
  		return stringValue === '[object RegExp]'
  			|| stringValue === '[object Date]'
  			|| isReactElement(value)
  	}
  
  	// see https://github.com/facebook/react/blob/b5ac963fb791d1298e7f396236383bc955f916c1/src/isomorphic/classic/element/ReactElement.js#L21-L25
  	var canUseSymbol = typeof Symbol === 'function' && Symbol.for
  	var REACT_ELEMENT_TYPE = canUseSymbol ? Symbol.for('react.element') : 0xeac7
  
  	function isReactElement(value) {
  		return value.$$typeof === REACT_ELEMENT_TYPE
  	}
  
  	function emptyTarget(val) {
  		return Array.isArray(val) ? [] : {}
  	}
  
  	function cloneUnlessOtherwiseSpecified(value, optionsArgument) {
  		var clone = !optionsArgument || optionsArgument.clone !== false
  
  		return (clone && isMergeableObject(value))
  			? deepmerge(emptyTarget(value), value, optionsArgument)
  			: value
  	}
  
  	function defaultArrayMerge(target, source, optionsArgument) {
  		return target.concat(source).map(function(element) {
  			return cloneUnlessOtherwiseSpecified(element, optionsArgument)
  		})
  	}
  
  	function mergeObject(target, source, optionsArgument) {
  		var destination = {}
  		if (isMergeableObject(target)) {
  			Object.keys(target).forEach(function(key) {
  				destination[key] = cloneUnlessOtherwiseSpecified(target[key], optionsArgument)
  			})
  		}
  		Object.keys(source).forEach(function(key) {
  			if (!isMergeableObject(source[key]) || !target[key]) {
  				destination[key] = cloneUnlessOtherwiseSpecified(source[key], optionsArgument)
  			} else {
  				destination[key] = deepmerge(target[key], source[key], optionsArgument)
  			}
  		})
  		return destination
  	}
  
  	function deepmerge(target, source, optionsArgument) {
  		var sourceIsArray = Array.isArray(source)
  		var targetIsArray = Array.isArray(target)
  		var options = optionsArgument || { arrayMerge: defaultArrayMerge }
  		var sourceAndTargetTypesMatch = sourceIsArray === targetIsArray
  
  		if (!sourceAndTargetTypesMatch) {
  			return cloneUnlessOtherwiseSpecified(source, optionsArgument)
  		} else if (sourceIsArray) {
  			var arrayMerge = options.arrayMerge || defaultArrayMerge
  			return arrayMerge(target, source, optionsArgument)
  		} else {
  			return mergeObject(target, source, optionsArgument)
  		}
  	}
  
  	deepmerge.all = function deepmergeAll(array, optionsArgument) {
  		if (!Array.isArray(array)) {
  			throw new Error('first argument should be an array')
  		}
  
  		return array.reduce(function(prev, next) {
  			return deepmerge(prev, next, optionsArgument)
  		}, {})
  	}
  
  	return  deepmerge;
  	
  });