code: @Override
      public DescribeLogGroupsResult describeLogGroups(DescribeLogGroupsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeLogGroups(request);
      }
docs: <p>
  Lists the specified log groups. You can list all your log groups or filter the results by prefix. The results are
  ASCII-sorted by log group name.
  </p>
  
  @param describeLogGroupsRequest
  @return Result of the DescribeLogGroups operation returned by the service.
  @throws InvalidParameterException
  A parameter is specified incorrectly.
  @throws ServiceUnavailableException
  The service cannot complete the request.
  @sample AWSLogs.DescribeLogGroups
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/logs-2014-03-28/DescribeLogGroups" target="_top">AWS API
  Documentation</a>