INTERFACE {{p}}if_park_eval PUBLIC.
  TYPES:
    ty_park_id TYPE c LENGTH 4,
    ty_tariff  TYPE c LENGTH 1,
    BEGIN OF ty_session,
      park_id      TYPE ty_park_id,
      tariff       TYPE ty_tariff,
      duration_min TYPE i,
    END OF ty_session,
    tt_session TYPE STANDARD TABLE OF ty_session WITH EMPTY KEY,
    BEGIN OF ty_summary,
      park_id     TYPE ty_park_id,
      session_cnt TYPE i,
      total_min   TYPE i,
      total_fee   TYPE p LENGTH 8 DECIMALS 2,
    END OF ty_summary,
    tt_summary TYPE STANDARD TABLE OF ty_summary WITH EMPTY KEY.

  METHODS summarize
    IMPORTING it_session        TYPE tt_session
    RETURNING VALUE(rt_summary) TYPE tt_summary.
ENDINTERFACE.