public java.util.List<TransitGatewayMulticastGroup> getMulticastGroups() {
        if (multicastGroups == null) {
            multicastGroups = new com.amazonaws.internal.SdkInternalList<TransitGatewayMulticastGroup>();
        }
        return multicastGroups;
    }
<p>
Information about the transit gateway multicast group.
</p>

@return Information about the transit gateway multicast group.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/SearchTransitGatewayMulticastGroupsResult.java