file/app/Jobs/FileConversionQueue.php

<?php

namespace App\Jobs;

use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldBeUnique;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;

class FileConversionQueue implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    protected $file = null;
    protected $collection = null;
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct($file, $collection)
    {
        $this->file = $file;
        $this->collection = $collection;
    }

    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        //
    }
}