@Override
  public Optional<Block> createBlock(final BlockHeader parentHeader, final long timestamp) {
    // One-off block creation has not been implemented
    return Optional.empty();
  }
Instantiates a new Bft mining coordinator.

@param bftExecutors the bft executors
@param eventHandler the event handler
@param bftProcessor the bft processor
@param blockCreatorFactory the block creator factory
@param blockchain the blockchain
@param eventQueue the event queue
@param syncState the sync state
consensus/common/src/main/java/org/hyperledger/besu/consensus/common/bft/blockcreation/BftMiningCoordinator.java