@Override
    public RegisterTransitGatewayMulticastGroupSourcesResult registerTransitGatewayMulticastGroupSources(
            RegisterTransitGatewayMulticastGroupSourcesRequest request) {
        request = beforeClientExecution(request);
        return executeRegisterTransitGatewayMulticastGroupSources(request);
    }
<p>
Registers sources (network interfaces) with the specified transit gateway multicast group.
</p>
<p>
A multicast source is a network interface attached to a supported instance that sends multicast traffic. For more
information about supported instances, see <a
href="https://docs.aws.amazon.com/vpc/latest/tgw/tgw-multicast-overview.html">Multicast on transit gateways</a>
in the <i>Amazon Web Services Transit Gateways Guide</i>.
</p>
<p>
After you add the source, use <a
href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_SearchTransitGatewayMulticastGroups.html"
>SearchTransitGatewayMulticastGroups</a> to verify that the source was added to the multicast group.
</p>

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