code: @Override
      public DescribeOptionGroupsResult describeOptionGroups(DescribeOptionGroupsRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeOptionGroups(request);
      }
docs: <p>
  Describes the available option groups.
  </p>
  
  @param describeOptionGroupsRequest
  @return Result of the DescribeOptionGroups operation returned by the service.
  @throws OptionGroupNotFoundException
  The specified option group could not be found.
  @sample AmazonRDS.DescribeOptionGroups
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DescribeOptionGroups" target="_top">AWS API
  Documentation</a>