INTERFACE {{p}}if_licence_merge PUBLIC.
  TYPES ty_product TYPE c LENGTH 10.
  TYPES ty_cost_centre TYPE c LENGTH 6.
  TYPES ty_price TYPE p LENGTH 8 DECIMALS 2.
  TYPES:
    BEGIN OF ty_licence,
      product     TYPE ty_product,
      cost_centre TYPE ty_cost_centre,
      seats       TYPE i,
      unit_price  TYPE ty_price,
    END OF ty_licence.
  TYPES tt_licences TYPE STANDARD TABLE OF ty_licence WITH EMPTY KEY.

  METHODS merge
    IMPORTING it_primary       TYPE tt_licences
              it_secondary     TYPE tt_licences
    RETURNING VALUE(rt_merged) TYPE tt_licences.
ENDINTERFACE.