text: "use strict";
  
  exports.unsafeNew = function() {
    return new Headers();
  };
  
  exports.unsafeAppend = function(key, value, headers) {
    return headers.append(key, value);
  };
  
  exports.unsafeFromRecord = function(r) {
    return new Headers(r);
  };
  
  exports._toArray = function(tuple, headers) {
    return Array.from(headers.entries(), function (pair) {
      return tuple(pair[0])(pair[1]);
    });
  };
  
  exports.fromObject = function(obj) {
    return new Headers(obj);
  };
  