@Override
    public StopGameSessionPlacementResult stopGameSessionPlacement(StopGameSessionPlacementRequest request) {
        request = beforeClientExecution(request);
        return executeStopGameSessionPlacement(request);
    }
<p>
Cancels a game session placement that is in <code>PENDING</code> status. To stop a placement, provide the
placement ID values. If successful, the placement is moved to <code>CANCELLED</code> status.
</p>

@param stopGameSessionPlacementRequest
@return Result of the StopGameSessionPlacement operation returned by the service.
@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 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 UnauthorizedException
        The client failed authentication. Clients should not retry such requests.
@sample AmazonGameLift.StopGameSessionPlacement
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/gamelift-2015-10-01/StopGameSessionPlacement"
     target="_top">AWS API Documentation</a>
aws-java-sdk-gamelift/src/main/java/com/amazonaws/services/gamelift/AmazonGameLiftClient.java