@SdkInternalApi
    final EnableFastLaunchResult executeEnableFastLaunch(EnableFastLaunchRequest enableFastLaunchRequest) {

        ExecutionContext executionContext = createExecutionContext(enableFastLaunchRequest);
        AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
        awsRequestMetrics.startEvent(Field.ClientExecuteTime);
        Request<EnableFastLaunchRequest> request = null;
        Response<EnableFastLaunchResult> response = null;

        try {
            awsRequestMetrics.startEvent(Field.RequestMarshallTime);
            try {
                request = new EnableFastLaunchRequestMarshaller().marshall(super.beforeMarshalling(enableFastLaunchRequest));
                // Binds the request metrics to the current request.
                request.setAWSRequestMetrics(awsRequestMetrics);
                request.addHandlerContext(HandlerContextKey.CLIENT_ENDPOINT, endpoint);
                request.addHandlerContext(HandlerContextKey.ENDPOINT_OVERRIDDEN, isEndpointOverridden());
                request.addHandlerContext(HandlerContextKey.SIGNING_REGION, getSigningRegion());
                request.addHandlerContext(HandlerContextKey.SERVICE_ID, "EC2");
                request.addHandlerContext(HandlerContextKey.OPERATION_NAME, "EnableFastLaunch");
                request.addHandlerContext(HandlerContextKey.ADVANCED_CONFIG, advancedConfig);

            } finally {
                awsRequestMetrics.endEvent(Field.RequestMarshallTime);
            }

            StaxResponseHandler<EnableFastLaunchResult> responseHandler = new StaxResponseHandler<EnableFastLaunchResult>(
                    new EnableFastLaunchResultStaxUnmarshaller());

            response = invoke(request, responseHandler, executionContext);

            return response.getAwsResponse();

        } finally {

            endClientExecution(awsRequestMetrics, request, response);
        }
    }
<p>
When you enable Windows fast launch for a Windows AMI, images are pre-provisioned, using snapshots to launch
instances up to 65% faster. To create the optimized Windows image, Amazon EC2 launches an instance and runs
through Sysprep steps, rebooting as required. Then it creates a set of reserved snapshots that are used for
subsequent launches. The reserved snapshots are automatically replenished as they are used, depending on your
settings for launch frequency.
</p>
<note>
<p>
You can only change these settings for Windows AMIs that you own or that have been shared with you.
</p>
</note>

@param enableFastLaunchRequest
@return Result of the EnableFastLaunch operation returned by the service.
@sample AmazonEC2.EnableFastLaunch
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/EnableFastLaunch" target="_top">AWS API
     Documentation</a>
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/AmazonEC2Client.java