@SdkInternalApi
    final DescribeSourceRegionsResult executeDescribeSourceRegions(DescribeSourceRegionsRequest describeSourceRegionsRequest) {

        ExecutionContext executionContext = createExecutionContext(describeSourceRegionsRequest);
        AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
        awsRequestMetrics.startEvent(Field.ClientExecuteTime);
        Request<DescribeSourceRegionsRequest> request = null;
        Response<DescribeSourceRegionsResult> response = null;

        try {
            awsRequestMetrics.startEvent(Field.RequestMarshallTime);
            try {
                request = new DescribeSourceRegionsRequestMarshaller().marshall(super.beforeMarshalling(describeSourceRegionsRequest));
                // 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, "RDS");
                request.addHandlerContext(HandlerContextKey.OPERATION_NAME, "DescribeSourceRegions");
                request.addHandlerContext(HandlerContextKey.ADVANCED_CONFIG, advancedConfig);

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

            StaxResponseHandler<DescribeSourceRegionsResult> responseHandler = new StaxResponseHandler<DescribeSourceRegionsResult>(
                    new DescribeSourceRegionsResultStaxUnmarshaller());

            response = invoke(request, responseHandler, executionContext);

            return response.getAwsResponse();

        } finally {

            endClientExecution(awsRequestMetrics, request, response);
        }
    }
<p>
Returns a list of the source Amazon Web Services Regions where the current Amazon Web Services Region can create
a read replica, copy a DB snapshot from, or replicate automated backups from.
</p>
<p>
Use this operation to determine whether cross-Region features are supported between other Regions and your
current Region. This operation supports pagination.
</p>
<p>
To return information about the Regions that are enabled for your account, or all Regions, use the EC2 operation
<code>DescribeRegions</code>. For more information, see <a
href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeRegions.html"> DescribeRegions</a> in
the <i>Amazon EC2 API Reference</i>.
</p>

@param describeSourceRegionsRequest
@return Result of the DescribeSourceRegions operation returned by the service.
@sample AmazonRDS.DescribeSourceRegions
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/DescribeSourceRegions" target="_top">AWS API
     Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java