throw new AssertionError("Do not instantiate");
    }

    public static AllocationService createAllocationService(Settings settings) {
        return createAllocationService(settings, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS));
    }

    public static AllocationService createAllocationService(Settings settings, ClusterSettings clusterSettings) {
        return new AllocationService(

        int numIndices = toInt(params[0]);
        int numShards = toInt(params[1]);
        int numReplicas = toInt(params[2]);
        int numNodes = toInt(params[3]);

        strategy = Allocators.createAllocationService(
            Settings.builder().put("cluster.routing.allocation.awareness.attributes", "tag").build()
        );

        Metadata.Builder mb = Metadata.builder();
        for (int i = 1; i <= numIndices; i++) {