public static MintKeyObject /*Object*/ producer(int objectType)
  {
    switch (objectType)
    {
      case 0:
        // return new MintEvent();
        mint.api.domain.schedule.MintCourse r = new mint.api.domain.schedule.MintCourse();
        return r;
      case 1:
        // return new MintAssignment();
        MintContinuity c = new MintContinuity();
        c.setDescription("foobar");
        return c;
      case 2:
        // return new MintEvent() {{ setKey(1234L); }};
        r = new mint.api.domain.schedule.MintCourse();
        r.setKey(1234L);
        r.setScheduleId("bla");
        return r;
      default:
        throw new IllegalArgumentException("unsupported object type");
    }
  }