Method _isParentVertical

src/cdk/menu/menu-item.ts:314–316

* Return true if the enclosing parent menu is configured in a horizontal orientation, false * otherwise or if no parent.

()

   * otherwise or if no parent.
   */
  private _isParentVertical() {
    return this._parentMenu?.orientation === 'vertical';
  }

  /** Sets the `type` attribute of the menu item. */
  private _setType() {