Was like this for all other objects already.

Unfortunately there doesn't seem to be any "deep strict" mode in Zod,
so we have to add them individually like this.

Using star import would result in this kind of object being imported:
 {
    _vehicle_schedule_frames: [Getter],
    _journey_pattern_refs: [Getter],
    default: {
      _vehicle_schedule_frames: { ... },
      _journey_pattern_refs: { ... }
    }
  }
This is not valid when passed to the json schema parser.