code: function Flyout_flyoutAnimateIn() {
                      if (this._keyboardMovedUs) {
                          return this._baseAnimateIn();
                      } else {
                          this._element.style.opacity = 1;
                          this._element.style.visibility = "visible";
                          return Animations.showPopup(this._element, (typeof this._currentPosition !== 'undefined') ? this._currentPosition.animOffset : 0);
                      }
                  }
docs: AppBar flyout animations