checkIn method
Implementation
void checkIn(UHotelReservationResponse i) => UServices.hotel.checkInHotelReservation(
p: UIdParams(id: i.id),
onOk: (UEmptyResponse r) => okCallback(r.message, read),
onError: (UResponse<dynamic> r) => errorCallBack(r.message, read),
onException: (String e) => errorCallBack(U.s.errorSubmittingForm, read),
);