checkNotNull(dataChildByName,
"Cannot find %s node in schema context. Instance identifier has to start from root", topLevelElement);
instanceIdToNodes = InstanceIdToNodes.fromSchemaAndQNameChecked(ctx, topLevelElement.getNodeType());
checkNotNull(dataChildByName,
"Cannot find %s node in schema context. Instance identifier has to start from root", topLevelElement);
instanceIdToNodes = InstanceIdToNodes.fromSchemaAndQNameChecked(ctx, topLevelElement.getNodeType());