</span>
	
	<span class="task-item-suffix">required method</span>
</li><li>
	<span class="tooltip">
		<code><a href="#//api/name/nodeAdded:">&ndash;&nbsp;nodeAdded:</a></code>
	</span>
	
	<span class="task-item-suffix">required method</span>
</li><li>
	<span class="tooltip">
		<code><a href="#//api/name/nodeRemoved:">&ndash;&nbsp;nodeRemoved:</a></code>
	</span>
	
	<span class="task-item-suffix">required method</span>
</li><li>
	<span class="tooltip">
		<code><a href="#//api/name/enumerateDrawableNodesWithBl