anchor.diff:  
       lv_xstr = interface_to_xstring( ).
       li_document = cl_ixml_80_20=>parse_to_document( stream_xstring = lv_xstr ).
  +    fix_oref( li_document ).
       io_xml->set_raw( li_document->get_root_element( ) ).
   
     ENDMETHOD.                    "serialize
  
positive.code: 
    ENDMETHOD.
  
    METHOD lif_object~serialize.
  
      DATA: lv_xstr     TYPE xstring,
  
negative.code:       load
          RETURNING VALUE(ri_wb_interface) TYPE REF TO if_fp_wb_interface
          RAISING lcx_exception,
        fix_oref
          IMPORTING ii_document TYPE REF TO if_ixml_document,
        interface_to_xstring
          RETURNING VALUE(rv_xstr) TYPE xstring
          RAISING lcx_exception.
  