+/**
+ * GtkTickCallback:
+ * @widget: the widget
+ * @frame_clock: the frame clock for the widget (same as calling gtk_widget_get_frame_clock())
+ * @user_data: user data passed to gtk_widget_add_tick_callback().
+ *
+ * Callback type for adding a function to update animations. See gtk_widget_add_tick_callback().
+ *
+ * Returns: %G_SOURCE_CONTINUE if the tick callback should continue to be called,
+ * %G_SOURCE_REMOVE if the tick callback should be removed.
+ *
+ * Since: 3.8
+ */
+typedef gboolean (*GtkTickCallback) (GtkWidget *widget,
+ GdkFrameClock *frame_clock,
+ gpointer user_data);
+