code: function () {
              return this.sort().wrapItems ?
                  new ObjectIterator(this._keys, this._values.map(function (item) {
                      return item.value;
                  })) :
                  new SjlMap.prototype.entries.call(this.sort());
          }
docs: Returns a key-value es6 compliant iterator.
  @method sjl.stdlib.ObjectIterator#entries
  @overrides sjl.stdlib.SjlMap#entries
  @returns {sjl.stdlib.ObjectIterator}