code: @Override
      public DescribeSharedDirectoriesResult describeSharedDirectories(DescribeSharedDirectoriesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeSharedDirectories(request);
      }
docs: <p>
  Returns the shared directories in your account.
  </p>
  
  @param describeSharedDirectoriesRequest
  @return Result of the DescribeSharedDirectories operation returned by the service.
  @throws EntityDoesNotExistException
  The specified entity could not be found.
  @throws InvalidNextTokenException
  The <code>NextToken</code> value is not valid.
  @throws InvalidParameterException
  One or more parameters are not valid.
  @throws UnsupportedOperationException
  The operation is not supported.
  @throws ClientException
  A client exception has occurred.
  @throws ServiceException
  An exception has occurred in AWS Directory Service.
  @sample AWSDirectoryService.DescribeSharedDirectories
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ds-2015-04-16/DescribeSharedDirectories" target="_top">AWS
  API Documentation</a>