anchor.diff:      lv_index = lines( gt_stack ).
   
       IF lv_index = 0.
  +      r_exit = 'X'.
         RETURN.
       ENDIF.
   
  
positive.code: 
    ENDMETHOD.
  
  ENDCLASS.
negative.code:       RAISING lcx_exception.
  
      CLASS-METHODS back
        RETURNING VALUE(r_exit) TYPE xfeld
        RAISING lcx_exception.
  
      CLASS-METHODS call_page
  