@Override
    public DescribeSourceRegionsResult describeSourceRegions(DescribeSourceRegionsRequest request) {
        request = beforeClientExecution(request);
        return executeDescribeSourceRegions(request);
    }
<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