class BlockUtils {

    public static Set<Keccak256> unknownAncestorsHashes(Keccak256 blockHash, Blockchain blockChain, NetBlockStore store) {
        Set<Keccak256> hashes = Collections.singleton(blockHash);
        return unknownAncestorsHashes(hashes, blockChain, store, true);
    }

    private  BlockUtils();

}