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vendor/doctrine/persistence/lib/Doctrine/Common/NotifyPropertyChanged.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Doctrine\Common;
+
+/**
+ * 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);
+}