Method _isOverContainer

src/cdk/drag-drop/drop-list-ref.ts:676–678

* Checks whether the user's pointer is positioned over the container. * @param x Pointer position along the X axis. * @param y Pointer position along the Y axis.

(x: number, y: number)

   * @param y Pointer position along the Y axis.
   */
  _isOverContainer(x: number, y: number): boolean {
    return this._domRect != null && isInsideClientRect(this._domRect, x, y);
  }

  /**
   * Figures out whether an item should be moved into a sibling