Method notify

include/behaviortree_cpp/utils/signal.h:21–35

  using Subscriber = std::shared_ptr<CallableFunction>;

  void notify(CallableArgs... args)
  {
    for(size_t i = 0; i < subscribers_.size();)
    {
      if(auto sub = subscribers_[i].lock())
      {
        (*sub)(args...);
        i++;
      }
      else
      {
        subscribers_.erase(subscribers_.begin() + i);
      }
    }
  }

  Subscriber subscribe(CallableFunction func)
  {