REFERENCE(E_TREE_DOCUMENTS) TYPE REF TO CL_GUI_LIST_TREE
REFERENCE(G_TREE) TYPE REF TO CL_GUI_LIST_TREE OPTIONAL
REFERENCE(G_TREE) TYPE REF TO CL_GUI_LIST_TREE
REFERENCE(TREE_CONTROL_EO) TYPE REF TO CL_GUI_LIST_TREE
REFERENCE(TREE_CONTROL_IO) TYPE REF TO CL_GUI_LIST_TREE