php - How to set a broadcast driver in the event of laravel?

one text

I have an event like this

<?php

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;

class NotifyUser implements ShouldBroadcast
{
    use Dispatchable, InteractsWithSockets, SerializesModels;

    protected $user_id;
    public $message;
    public $link;
    public $notification_id;


    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($notification)
    {
        $this->notification_id = $notification->id;
        $this->user_id = $notification->user_id;
        $this->message = $notification->message;  
        $this->link = $notification->link;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return \Illuminate\Broadcasting\Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('notification.user.'.trim($this->user_id));
    }
}

And I have configured both pusher and mercury, is it possible to choose which broadcasting driver to use per event? Instead of always using the default?