void
ColladaNode::handleInstanceNode(domInstance_node *instNode,
                                InstData         &instData)
{
    ColladaInstanceNodeRefPtr colInstNode =
        getUserDataAs<ColladaInstanceNode>(instNode);
    ColladaInstInfoRefPtr     colInstInfo =
        ColladaNodeInstInfo::create(this, colInstNode, instData._bottomN);

    Node *childN = colInstNode->getTargetElem()->createInstance(colInstInfo);

    appendChild(colInstNode->getTargetDOMElem(), childN, instData);
}