@Override
  public Collection<Address> validatorsInBlock(final BlockHeader header) {
    return ibftExtraDataCodec.decode(header).getValidators();
  }
Constructor for IbftLegacyBlockInterface.

@param bftExtraDataCodec the codec for BFT extra data
consensus/ibftlegacy/src/main/java/org/hyperledger/besu/consensus/ibftlegacy/IbftLegacyBlockInterface.java