if (!(refChild instanceof NodeImpl)) throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, "wrong node type: "); final DocumentImpl prevDoc = new DocumentImpl(ownerDocument);
	public Node insertAfter(NodeList nodes, Node refChild) throws DOMException {		if (!(refChild instanceof NodeImpl))			throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, "wrong node type");		final DocumentImpl prevDoc = new DocumentImpl(ownerDocument);		if (refChild == null)			return appendChildren(nodes, -1);		final NodeImpl ref = (NodeImpl) refChild;		final long first = firstChildID();		if (ref.gid < first || ref.gid > ref.gid + children - 1)			throw new DOMException(				DOMException.HIERARCHY_REQUEST_ERR,				"reference node is not a child of the selected node");		final int level = ownerDocument.getTreeLevel(gid);		Node result = appendChildren(ref.gid + 1, getLastNode(ref), getPath(), nodes, false);		ownerDocument.broker.update(this);		if (ownerDocument.reindex > -1) {			ownerDocument.reindex = level + 1;			ownerDocument.broker.reindex(prevDoc, ownerDocument, null);		} else {			ownerDocument.reindex = level + 1;			ownerDocument.broker.reindex(prevDoc, ownerDocument, this);		}		return result;	}