public static Bytes encodeUnsealed(final Bytes vanityData, final List<Address> validators) {
    return encode(vanityData, validators, Optional.empty());
  }
Encode unsealed to bytes.

@param vanityData the vanity data
@param validators the validators
@return the bytes
consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/CliqueExtraData.java