Function _closeDialogVia

src/material/dialog/dialog-ref.ts:261–264

(ref: MatDialogRef<R>, interactionType: FocusOrigin, result?: R)

 */
// TODO: Move this back into `MatDialogRef` when we provide an official mock dialog ref.
export function _closeDialogVia<R>(ref: MatDialogRef<R>, interactionType: FocusOrigin, result?: R) {
  (ref as unknown as {_closeInteractionType: FocusOrigin})._closeInteractionType = interactionType;
  return ref.close(result);
}