@UnstableApi
    public static XdsEndpointGroup of(ClusterSnapshot clusterSnapshot) {
        requireNonNull(clusterSnapshot, "clusterSnapshot");
        return new XdsEndpointGroup(new ClusterManager(clusterSnapshot), false);
    }
Creates a {@link XdsEndpointGroup} based on the specified {@link ClusterSnapshot}.
This may be useful if one would like to create an {@link EndpointGroup} based on
a {@link GrpcService}.
xds/src/main/java/com/linecorp/armeria/xds/client/endpoint/XdsEndpointGroup.java