code: func (c *StorageGateway) StartGateway(input *StartGatewayInput) (*StartGatewayOutput, error) {
  	req, out := c.StartGatewayRequest(input)
  	return out, req.Send()
  }
docs: // StartGateway API operation for AWS Storage Gateway.
  //
  // Starts a gateway that you previously shut down (see ShutdownGateway). After
  // the gateway starts, you can then make other API calls, your applications
  // can read from or write to the gateway's storage volumes and you will be able
  // to take snapshot backups.
  //
  // When you make a request, you will get a 200 OK success response immediately.
  // However, it might take some time for the gateway to be ready. You should
  // call DescribeGatewayInformation and check the status before making any additional
  // API calls. For more information, see ActivateGateway.
  //
  // To specify which gateway to start, use the Amazon Resource Name (ARN) of
  // the gateway in your request.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for AWS Storage Gateway's
  // API operation StartGateway for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeInvalidGatewayRequestException "InvalidGatewayRequestException"
  //   An exception occurred because an invalid gateway request was issued to the
  //   service. For more information, see the error and message fields.
  //
  //   * ErrCodeInternalServerError "InternalServerError"
  //   An internal server error has occurred during the request. For more information,
  //   see the error and message fields.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/storagegateway-2013-06-30/StartGateway