<?php namespace Doctrine\Persistence; /** * Interface for classes that notify event listeners of changes to their managed properties. * * This interface is implemented by objects that manually want to notify their object manager or * other listeners when properties change, instead of relying on the object manager to compute * property changes itself when changes are to be persisted. */ interface NotifyPropertyChanged { /** * Adds a listener that wants to be notified about property changes. * * @return void */ public function addPropertyChangedListener(PropertyChangedListener $listener); }