Method closeOpenSiblings

src/cdk/menu/menu-item.ts:288–289

()

  private _setupMouseEnter() {
    if (!this._isStandaloneItem()) {
      const closeOpenSiblings = () =>
        this._ngZone.run(() => this._menuStack.closeSubMenuOf(this._parentMenu!));

      this._cleanupMouseEnter = this._ngZone.runOutsideAngular(() =>
        this._renderer.listen(this._elementRef.nativeElement, 'mouseenter', () => {