NodeWalker<E> nextNodeWalker() {
      if (node.children == null) {
        return null;
      }
      while (lastRead < 255) {
        lastRead++;
        Node<E> child = node.children[lastRead];
        if (child != null) {
          return new NodeWalker<>(child);
        }
      }
      return null;
    }
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