@Override
  protected void internalBlockAdded(final BlockHeader blockHeader, final FeeMarket feeMarket) {
    // no-op
  }
Holds the current set of pending transactions with the ability to iterate them based on priority
for mining or look-up by hash.

<p>This class is safe for use across multiple threads.
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/transactions/layered/GasPricePrioritizedTransactions.java