root->type_->by_name_or_create("ACTOR_LINK", actor_type, actor_type);
root->type_->by_name_or_create("ACTOR_TASK_LINK", actor_type, actor_type);
root->type_->by_name_or_create("ACTOR_LINK", actor_type, actor_type);
root->type_->by_name_or_create("ACTOR_TASK_LINK", actor_type, actor_type);