Hi,
Keep in mind the following hierarchy.
Controller->context->Context_node
1- You are inside a setter of the context node so the me will be the implementation of the context node,
this sentence ( me->TYPED_CONTEXT->zchild_detail->collection_wrapper->get_current( ). ) only will work if you are in the controller class
2- The context node that has this setter is the ZCHILD_DETAIL?
3- zchild_detail is a value node?
Regards,
Luis