anchor.diff:      CLASS-DATA: gi_page        TYPE REF TO lif_gui_page,
                   gt_stack       TYPE TABLE OF REF TO lif_gui_page,
                   gt_assets      TYPE char40_t,
  +                go_router      TYPE REF TO lcl_gui_router,
                   go_html_viewer TYPE REF TO cl_gui_html_viewer.
   
       CLASS-METHODS view
  
positive.code: 
      CLASS-METHODS back
        RETURNING VALUE(rv_exit) TYPE xfeld
        RAISING   lcx_exception.
  
      CLASS-METHODS call_page
  
negative.code:         lcl_background=>run( ).
        ELSE.
          lcl_gui=>startup( ). " TODO: refactor, probably make it class constructor
          lcl_gui=>go_home( ).
  
          CALL SELECTION-SCREEN 1001. " trigger screen
        ENDIF.
  