@Override
    public StopMatchmakingResult stopMatchmaking(StopMatchmakingRequest request) {
        request = beforeClientExecution(request);
        return executeStopMatchmaking(request);
    }
<p>
Cancels a matchmaking ticket or match backfill ticket that is currently being processed. To stop the matchmaking
operation, specify the ticket ID. If successful, work on the ticket is stopped, and the ticket status is changed
to <code>CANCELLED</code>.
</p>
<p>
This call is also used to turn off automatic backfill for an individual game session. This is for game sessions
that are created with a matchmaking configuration that has automatic backfill enabled. The ticket ID is included
in the <code>MatchmakerData</code> of an updated game session object, which is provided to the game server.
</p>
<note>
<p>
If the operation is successful, the service sends back an empty JSON struct with the HTTP 200 response (not an
empty HTTP body).
</p>
</note>
<p>
<b>Learn more</b>
</p>
<p>
<a href="https://docs.aws.amazon.com/gamelift/latest/flexmatchguide/match-client.html"> Add FlexMatch to a game
client</a>
</p>

@param stopMatchmakingRequest
@return Result of the StopMatchmaking 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 NotFoundException
        THe requested resources was not found. The resource was either not created yet or deleted.
@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.StopMatchmaking
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/gamelift-2015-10-01/StopMatchmaking" target="_top">AWS API
     Documentation</a>
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/AmazonGameLiftClient.java