WTX doesnt support REFCURSOR type from Oracle DB

USE CASE

Our customer isn't able to retrieve data from Oracle Cursor defined in Packaged function.

create or replace
Package          ESB_TEST_TRN
AS

FUNCTION get_trans(ptxt_status IN NUMBER, pnum_rows IN NUMBER)
    RETURN SYS_REFCURSOR;

  esbpokusrec    x_esb_pokus%ROWTYPE;
  TYPE TableTx IS TABLE OF x_esb_pokus%ROWTYPE;
END ESB_TEST_TRN;
/*********************************************************************/
create or replace
Package Body          ESB_TEST_TRN
AS
FUNCTION get_trans(ptxt_status IN NUMBER, pnum_rows IN NUMBER)
   RETURN sys_refcursor
IS
lrcu_result  sys_refcursor;
BEGIN

   OPEN lrcu_result FOR
     SELECT transaction_id,
            status,
            col01,
            col02,
            col03,
            col04,
            col05,
            col06,
            col07,
            col08,
            col09,
            col10,
            col11,
            col12,
            col13,
            col14,
            col15
       FROM x_esb_pokus
      WHERE status = ptxt_status
        AND rownum< pnum_rows + 1;

   RETURN lrcu_result;

END;
END ESB_TEST_TRN;

In SQL we would normally select data from the Function using:
set serveroutput on;

declare
  v_rc sys_refcursor;
  esb_pokus_row x_esb_pokus%rowtype;
begin
  v_rc := esb_test_trn.get_trans(1,100);
  loop
    fetch v_rc
    into  esb_pokus_row;
    exit when v_rc%notfound;
    dbms_output.put_line(esb_pokus_row.transaction_id || ' | ' || esb_pokus_row.status || ' | ' || esb_pokus_row.col01);
  end loop;
  close v_rc;
end;

However this isn't supported by Database Interface Designer.