Method subscribe

packages/message/message_queue.ts:70–73

(topic: string, handler: (msg: T) => void)

  }

  subscribe<T>(topic: string, handler: (msg: T) => void) {
    this.EE.on(topic, handler);
    return this.EE.off.bind(this.EE, topic, handler) as () => void;
  }

  publish<T>(topic: string, message: NonNullable<T>) {
    chrome.runtime.sendMessage({