let mut seen = HashSet::new();

                current = iter_adjacent(txn, txn.graph(channel), *next, flag0, flag1)?

                let current_ = iter_adjacent(txn, txn.graph(channel), *next, flag0, flag1)?

                break;

                if seen.insert(current_) {
                    current = current_;
                    break;
                }

    let mut seen = HashSet::new();

        debug!("path = {:?}", path);

                if !seen.insert(next.dest()) {
                    continue;
                }