import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;

public final class Allocators {
    private static class NoopGatewayAllocator extends GatewayAllocator {
        public static final NoopGatewayAllocator INSTANCE = new NoopGatewayAllocator();

        @Override
        public void applyStartedShards(List<ShardRouting> startedShards, RoutingAllocation allocation) {
            // noop
        }