docs: function (str) {
              var res = this.reverse_dict[str];
              if (res) {
                  return res;
              }
              for (var key in this.full_dict) {
                  if (-1 !== this.full_dict[key].indexOf(str)) {
                      res = this.reverse_dict[str] = this._capitalize(key);
                      return res;
                  }
              }
              return false;
          }