VALUE(TREE_MODEL) TYPE REF TO CL_TREE_MODEL
REFERENCE(IV_TREE_OBJECT_MODEL) TYPE REF TO CL_TREE_MODEL
REFERENCE(IV_SENDER) TYPE REF TO CL_TREE_MODEL
REFERENCE(TREE_OBJECT) TYPE REF TO CL_TREE_MODEL
REFERENCE(IV_TREE_MODEL) TYPE REF TO CL_TREE_MODEL