anchor.diff:  
   ENDCLASS.
   
  -CLASS lcl_gui_page_diff DEFINITION FINAL.
  +CLASS lcl_gui_page_diff DEFINITION FINAL INHERITING FROM lcl_gui_page_super.
   
     PUBLIC SECTION.
  -    INTERFACES lif_gui_page.
  -
       METHODS: constructor
         IMPORTING
           is_local  TYPE ty_file
           is_remote TYPE ty_file.
   
  +    METHODS lif_gui_page~on_event REDEFINITION.
  +    METHODS lif_gui_page~render   REDEFINITION.
  +
     PRIVATE SECTION.
       DATA: mv_filename TYPE string,
             mo_diff     TYPE REF TO lcl_diff.
  
positive.code: 
      ro_html->add( '</table>' ).
      ro_html->add( '</div>' ).
      ro_html->add( lcl_gui=>footer( ) ).
  
    ENDMETHOD.
  
  
negative.code:     ro_html->add( lv_data ).
      ro_html->add( '</textarea><br><input type="submit" value="Update"></form>' ).
      ro_html->add( '</div>' ).
      ro_html->add( footer( ) ).
  
    ENDMETHOD.
  
  