code: @Override
      public DescribeSnapshotsResult describeSnapshots(DescribeSnapshotsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeSnapshots(request);
      }
docs: <p>
  Obtains information about the directory snapshots that belong to this account.
  </p>
  <p>
  This operation supports pagination with the use of the <i>NextToken</i> request and response parameters. If more
  results are available, the <i>DescribeSnapshots.NextToken</i> member contains a token that you pass in the next
  call to <a>DescribeSnapshots</a> to retrieve the next set of items.
  </p>
  <p>
  You can also specify a maximum number of return results with the <i>Limit</i> parameter.
  </p>
  
  @param describeSnapshotsRequest
  Contains the inputs for the <a>DescribeSnapshots</a> operation.
  @return Result of the DescribeSnapshots operation returned by the service.
  @throws EntityDoesNotExistException
  The specified entity could not be found.
  @throws InvalidParameterException
  One or more parameters are not valid.
  @throws InvalidNextTokenException
  The <code>NextToken</code> value is not valid.
  @throws ClientException
  A client exception has occurred.
  @throws ServiceException
  An exception has occurred in AWS Directory Service.
  @sample AWSDirectoryService.DescribeSnapshots
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ds-2015-04-16/DescribeSnapshots" target="_top">AWS API
  Documentation</a>