code: @Override
      public DescribeMaintenanceWindowsResult describeMaintenanceWindows(DescribeMaintenanceWindowsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeMaintenanceWindows(request);
      }
docs: <p>
  Retrieves the Maintenance Windows in an AWS account.
  </p>
  
  @param describeMaintenanceWindowsRequest
  @return Result of the DescribeMaintenanceWindows operation returned by the service.
  @throws InternalServerErrorException
  An error occurred on the server side.
  @sample AWSSimpleSystemsManagement.DescribeMaintenanceWindows
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/ssm-2014-11-06/DescribeMaintenanceWindows" target="_top">AWS
  API Documentation</a>