Method startPing

packages/event-service/src/client.ts:387–394

()

   * Returns an unsubscribe function. Calling it removes the handler.
   */
  onConnected(handler: () => void): () => void {
    this.connectedHandlers.add(handler);
    if (this.isConnected()) {
      handler();
    }
    return () => {
      this.connectedHandlers.delete(handler);
    };
  }

  /**