@Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
                          .add("selectionStrategy", selectionStrategy)
                          .add("allowEmptyEndpoints", allowEmptyEndpoints)
                          .add("initialized", initialEndpointsFuture.isDone())
                          .add("state", state)
                          .add("clusterManager", clusterManager)
                          .toString();
    }
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