anchor.diff:        ENDIF.
       ENDIF.
   
  -    lo_xml = serialize_xml( ).
  -    IF lo_xml IS BOUND.
  -      mo_files->add_xml( lo_xml ).
  -    ENDIF.
  +    serialize_xml( ).
   
     ENDMETHOD.                    "serialize
   
  
positive.code:   METHOD lif_object~serialize.
  
      DATA: lt_source TYPE seop_source_string,
            lo_xml    TYPE REF TO lcl_xml_output,
            ls_clskey TYPE seoclskey.
  
  
  
negative.code:       RAISING   lcx_exception.
  
      METHODS serialize_xml
        RAISING lcx_exception.
  
      METHODS remove_signatures
        CHANGING ct_source TYPE ty_string_tt.
  