code: @Override
      public UpdateVTLDeviceTypeResult updateVTLDeviceType(UpdateVTLDeviceTypeRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateVTLDeviceType(request);
      }
docs: <p>
  Updates the type of medium changer in a tape gateway. When you activate a tape gateway, you select a medium
  changer type for the tape gateway. This operation enables you to select a different type of medium changer after
  a tape gateway is activated. This operation is only supported in the tape gateway type.
  </p>
  
  @param updateVTLDeviceTypeRequest
  @return Result of the UpdateVTLDeviceType operation returned by the service.
  @throws InvalidGatewayRequestException
  An exception occurred because an invalid gateway request was issued to the service. For more information,
  see the error and message fields.
  @throws InternalServerErrorException
  An internal server error has occurred during the request. For more information, see the error and message
  fields.
  @sample AWSStorageGateway.UpdateVTLDeviceType
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/storagegateway-2013-06-30/UpdateVTLDeviceType"
  target="_top">AWS API Documentation</a>