As a follow-up to #69, the functions in `GraphsExtensions` still need to be tested: - [ ] `post_order_dfs_vertices` - [ ] `pre_order_dfs_vertices` - [ ] `post_order_dfs_edges` - [ ] `vertex_path` - [ ] `edge_path` - [ ] `parent_vertices` - [ ] `parent_vertex` - [ ] `parent_edges` - [ ] `parent_edge` - [ ] `mincut_partitions` - [ ] `eccentricities` - [ ] `decorate_graph_edges` - [ ] `decorate_graph_vertices` - [ ] `random_bfs_tree`