private void processAdded(final PendingTransaction addedTx, final AddReason addReason) {
    pendingTransactions.put(addedTx.getHash(), addedTx);
    final var senderTxs = txsBySender.computeIfAbsent(addedTx.getSender(), s -> new TreeMap<>());
    senderTxs.put(addedTx.getNonce(), addedTx);
    increaseCounters(addedTx);
    metrics.incrementAdded(addedTx, addReason, name());
    internalAdd(senderTxs, addedTx);
  }
Return the full content of this layer, organized as a list of sender pending txs. For each
sender the collection pending txs is ordered by nonce asc.

@return a list of sender pending txs
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/transactions/layered/AbstractTransactionsLayer.java