framework/php-packages/phpstan/stubs/Illuminate/Filesystem/FilesystemManager.stub

<?php

namespace Illuminate\Filesystem;

class FilesystemManager
{
    /**
     * Create a new filesystem manager instance.
     *
     * @param  \Illuminate\Contracts\Container\Container  $app
     * @return void
     */
    public function __construct($app)
    {
        $this->app = $app;
    }
}