@Override
          public E next() {
            if (next == null) {
              throw new NoSuchElementException();
            }
            last = next;
            advance();
            return last;
          }
Create a BytesTrieSet with a fixed length

@param byteLength length in bytes of the stored types
evm/src/main/java/org/hyperledger/besu/collections/trie/BytesTrieSet.java