CLASS zcl_abapgit_gui_functions DEFINITION PUBLIC CREATE PUBLIC . PUBLIC SECTION. INTERFACES: zif_abapgit_gui_functions. ENDCLASS. CLASS zcl_abapgit_gui_functions IMPLEMENTATION. METHOD zif_abapgit_gui_functions~gui_is_available. CALL FUNCTION 'GUI_IS_AVAILABLE' IMPORTING return = rv_gui_is_available. ENDMETHOD. ENDCLASS.