@Override
  public QbftBlockHeader getChainHeadHeader() {
    BlockHeader chainHeadHeader = blockchain.getChainHeadHeader();
    return new QbftBlockHeaderAdaptor(chainHeadHeader);
  }
Create a new instance of the adaptor.

@param blockchain The {@link Blockchain} to adapt.
consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/adaptor/QbftBlockchainAdaptor.java