code: @Override
      public DescribeGatewayInformationResult describeGatewayInformation(DescribeGatewayInformationRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeGatewayInformation(request);
      }
docs: <p>
  Returns metadata about a gateway such as its name, network interfaces, configured time zone, and the state
  (whether the gateway is running or not). To specify which gateway to describe, use the Amazon Resource Name (ARN)
  of the gateway in your request.
  </p>
  
  @param describeGatewayInformationRequest
  A JSON object containing the ID of the gateway.
  @return Result of the DescribeGatewayInformation 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.DescribeGatewayInformation
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/storagegateway-2013-06-30/DescribeGatewayInformation"
  target="_top">AWS API Documentation</a>