public void Unsubscribe(string id) => coordinatorAgent.Post(CoordinatorMessage.NewUnsubscribe(id));
public void PublishCommand(CoordinatorMessage command) => coordinatorAgent.Post(command);
public void Subscribe(string id, float initialAmount, IHubCallerConnectionContext <IStockTickerHubClient> caller) => coordinatorAgent.Post(CoordinatorMessage.NewSubscribe(id, initialAmount, caller));