code: @Override
      public DescribeWorkingStorageResult describeWorkingStorage(DescribeWorkingStorageRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeWorkingStorage(request);
      }
docs: <p>
  Returns information about the working storage of a gateway. This operation is only supported in the stored
  volumes gateway type. This operation is deprecated in cached volumes API version (20120630). Use
  DescribeUploadBuffer instead.
  </p>
  <note>
  <p>
  Working storage is also referred to as upload buffer. You can also use the DescribeUploadBuffer operation to add
  upload buffer to a stored volume gateway.
  </p>
  </note>
  <p>
  The response includes disk IDs that are configured as working storage, and it includes the amount of working
  storage allocated and used.
  </p>
  
  @param describeWorkingStorageRequest
  A JSON object containing the of the gateway.
  @return Result of the DescribeWorkingStorage 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.DescribeWorkingStorage
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/storagegateway-2013-06-30/DescribeWorkingStorage"
  target="_top">AWS API Documentation</a>