anchor.diff:  
     METHOD lif_object~serialize.
   
  -    DATA: lo_xml   TYPE REF TO lcl_xml,
  +    DATA: lo_xml   TYPE REF TO lcl_xml_output,
             ls_tsp1t TYPE tsp1t,
             ls_tsp1d TYPE tsp1d,
             ls_tsp0p TYPE tsp0p.
  
positive.code:     ENDTRY.
  
      CREATE OBJECT lo_xml.
      lo_xml->element_add( lv_ddtext ).
      mo_files->add_xml( lo_xml ).
  
      mo_files->add_abap( lt_source ).
  
negative.code: 
    METHOD lif_object~serialize.
  
      DATA: lo_xml    TYPE REF TO lcl_xml_output,
            ls_tpara  TYPE tpara,
            ls_tparat TYPE tparat.
  
  