Function come::utility::graph::sort_by_dfs_order

fn sort_by_dfs_order<G, FN, FE>(
    current_at: G::NodeId,
    visited: &mut Vec<G::NodeId>,
    result: &mut Vec<G::NodeId>,
    g: G,
    node_filter: FN,
    edge_filter: FE
)
where
    G: IntoNeighborsDirected + IntoEdgesDirected + Visitable + IntoNodeIdentifiers,
    G::NodeId: Debug,
    FN: FnMut(G::NodeId) -> bool + Copy,
    FE: FnMut(G::EdgeId) -> bool + Copy,