code: function (key) {
              var result = SjlMap.prototype.get.call(this, key);
              return this.wrapItems && result ? result.value : result;
          }
docs: Fetches value for key (returns unwrapped value if `wrapItems` is `true`).
  @param key {*}
  @method sjl.stdlib.PriorityList#get
  @overrides sjl.stdlib.SjlMap#get
  @returns {*}