else if (rdf_ResourceEquals(mResourceMgr, property, kURINC_Columns)) { return AddColumns(parent, value); }
RDFTreeDocumentImpl::AddChild(nsIRDFContent* parent,                              nsIRDFNode* property,                              nsIRDFNode* value){    if (IsTreeProperty(property) || rdf_IsContainer(mResourceMgr, mDB, value)) {        return AddTreeChild(parent, property, value);    }    else {        return AddPropertyChild(parent, property, value);    }}