#[allow(unused_imports)]
#[cfg(test)]
mod tests {
    use super::*;
    use indexmap::indexmap;
    use meritrank::edge::EdgeId;
    use meritrank::node::{Node, NodeId};
    use meritrank::poswalk::PosWalk;
    use meritrank::random_walk::RandomWalk;
    use meritrank::walk_storage::WalkStorage;
}