code: @Override
      public UpdateReservationResult updateReservation(UpdateReservationRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateReservation(request);
      }
docs: Update reservation.
  
  @param updateReservationRequest
  Request to update a reservation
  @return Result of the UpdateReservation operation returned by the service.
  @throws BadRequestException
  This request was invalid
  @throws InternalServerErrorException
  Internal service error
  @throws ForbiddenException
  You do not have permission to update reservation
  @throws BadGatewayException
  Bad gateway error
  @throws NotFoundException
  Reservation not found
  @throws GatewayTimeoutException
  Gateway timeout error
  @throws TooManyRequestsException
  Request limit exceeded
  @throws ConflictException
  The reservation could not be updated
  @sample AWSMediaLive.UpdateReservation
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/medialive-2017-10-14/UpdateReservation" target="_top">AWS
  API Documentation</a>