private void incrementTransactionRemovedCounter(
      final boolean receivedFromLocalSource, final boolean addedToBlock) {
    final String location = receivedFromLocalSource ? "local" : "remote";
    final String operation = addedToBlock ? "addedToBlock" : "dropped";
    transactionRemovedCounter.labels(location, operation).inc();
  }
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/sorter/AbstractPendingTransactionsSorter.java