code: function SearchBox_requestingFocusOnKeyboardInputHandler() {
                      this._fireEvent(EventName.receivingfocusonkeyboardinput, null);
                      if (_Global.document.activeElement !== this._inputElement) {
                          try {
                              this._inputElement.focus();
                          } catch (e) {
                          }
                      }
                  }
docs: Type to search helpers