type
    Trip = ref object
        id: string
        departure_time: string
        service_ids: Option[seq[string]]
        arrival_time: string
        trace_points: seq[int]
        sub_trip_index: Option[int]
        user_id: Option[string]
        sub_trips: Option[seq[Trip]]

/Users/benny/Downloads/Shani - check YIT - hebrew alt/Route.nim(155, 30) template/generic instantiation of `to` from here /Users/benny/.choosenim/toolchains/nim-1.0.0/lib/pure/json.nim(1103, 27) Error: The `to` macro does not support ref objects with cycles.