Method: CONSTRUCTOR
Method: WD_DESTROY_CONTEXT
Method: WD_CREATE_CONTEXT
Method: DO_HANDLE_EVENT
Method: SET_MODELS
Method: EH_ONCOLLAPSE
Method: EH_ONSHOWDETAILS
Method: DO_PREPARE_OUTPUT
Method: DO_INIT_CONTEXT
Method: EH_ONEXPAND
Method: GET_ITERATOR_4_TREE