def begin_update(reservation_order_id, reservation_id, parameters, custom_headers:nil)
      response = begin_update_async(reservation_order_id, reservation_id, parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def begin_update(reservation_order_id, reservation_id, parameters, custom_headers:nil)
      response = begin_update_async(reservation_order_id, reservation_id, parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Updates a `Reservation`.

 Updates the applied scopes of the `Reservation`.

 @param reservation_order_id [String] Order Id of the reservation

 @param reservation_id [String] Id of the Reservation Item
 @param parameters [Patch] Information needed to patch a reservation item
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [ReservationResponse] operation results.