code: @Override
      public DescribeMatchmakingResult describeMatchmaking(DescribeMatchmakingRequest request) {
          request = beforeClientExecution(request);
          return executeDescribeMatchmaking(request);
      }
docs: <p>
  Retrieves one or more matchmaking tickets. Use this operation to retrieve ticket information, including status
  and--once a successful match is made--acquire connection information for the resulting new game session.
  </p>
  <p>
  You can use this operation to track the progress of matchmaking requests (through polling) as an alternative to
  using event notifications. See more details on tracking matchmaking requests through polling or notifications in
  <a>StartMatchmaking</a>.
  </p>
  <p>
  To request matchmaking tickets, provide a list of up to 10 ticket IDs. If the request is successful, a ticket
  object is returned for each requested ID that currently exists.
  </p>
  <ul>
  <li>
  <p>
  <a>StartMatchmaking</a>
  </p>
  </li>
  <li>
  <p>
  <a>DescribeMatchmaking</a>
  </p>
  </li>
  <li>
  <p>
  <a>StopMatchmaking</a>
  </p>
  </li>
  <li>
  <p>
  <a>AcceptMatch</a>
  </p>
  </li>
  <li>
  <p>
  <a>StartMatchBackfill</a>
  </p>
  </li>
  </ul>
  
  @param describeMatchmakingRequest
  Represents the input for a request action.
  @return Result of the DescribeMatchmaking operation returned by the service.
  @throws InvalidRequestException
  One or more parameter values in the request are invalid. Correct the invalid parameter values before
  retrying.
  @throws InternalServiceException
  The service encountered an unrecoverable internal failure while processing the request. Clients can retry
  such requests immediately or after a waiting period.
  @throws UnsupportedRegionException
  The requested operation is not supported in the region specified.
  @sample AmazonGameLift.DescribeMatchmaking
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/gamelift-2015-10-01/DescribeMatchmaking" target="_top">AWS
  API Documentation</a>