message: Parameter by const&
diff: @@ -18,7 +18,7 @@ namespace vcpkg::Graphs
  };
  template <class V, class Func>
  - static void topological_sort_internal(V vertex,
  + static void topological_sort_internal(const V& vertex,
  ExplorationStatus& status,
  const Func adjacency_list_provider,
  std::unordered_map<V, ExplorationStatus>& exploration_status,
  