Link* link_by_name_or_null(const std::string& name) const;
Mailbox* mailbox_by_name_or_create(const std::string& name) const;
+ MessageQueue* message_queue_by_name_or_create(const std::string& name) const;
size_t get_actor_count() const;
std::vector<ActorPtr> get_all_actors() const;