final Part part = getPart(node.doc, false, 0);
final Part part = getPart(node.getDocument(), false, 0);
	public void remove(NodeProxy node) {		final Part part = getPart(node.doc, false, 0);		if (part == null)			return;		part.remove(node);		if (part.length == 0)			map.remove(node.doc);		setHasChanged();	}