@VisibleForTesting
  public NavigableMap<Bytes32, Bytes> getAccounts() {
    return stackTrie.getElement(startKeyHash).keys();
  }
Returns a list of accounts and the merkle proofs of an entire range
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/snapsync/request/AccountRangeDataRequest.java