code: @Override
      public DescribeEventTypesResult describeEventTypes(DescribeEventTypesRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeEventTypes(request);
      }
docs: <p>
  Returns the event types that meet the specified filter criteria. If no filter criteria are specified, all event
  types are returned, in no particular order.
  </p>
  
  @param describeEventTypesRequest
  @return Result of the DescribeEventTypes operation returned by the service.
  @throws InvalidPaginationTokenException
  The specified pagination token (<code>nextToken</code>) is not valid.
  @throws UnsupportedLocaleException
  The specified locale is not supported.
  @sample AWSHealth.DescribeEventTypes
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/health-2016-08-04/DescribeEventTypes" target="_top">AWS API
  Documentation</a>