@Override
    public int hashCode() {
        return Objects.hash(route, clusterSnapshot);
    }
The {@link ClusterSnapshot} that is represented by {@link RouteAction#getCluster()}.
If the {@link RouteAction} does not reference a cluster, the returned value may be {@code null}.
xds/src/main/java/com/linecorp/armeria/xds/RouteEntry.java