PHPFusion\Errors::getInstance PHP Метод

    public static function getInstance($key = 'default')
    {
        if (!isset(self::$instances[$key])) {
            self::$instances[$key] = new static();
        }
        return self::$instances[$key];
    }

<?php

/*-------------------------------------------------------+
| PHP-Fusion Content Management System
| Copyright (C) PHP-Fusion Inc
| https://www.php-fusion.co.uk/
+--------------------------------------------------------+
| Filename: errors.php
| Author: Hans Kristian Flaatten (Starefossen)
+--------------------------------------------------------+
| This program is released as free software under the
| Affero GPL license. You can redistribute it and/or
| modify it under the terms of this license which you
| can read by viewing the included agpl.txt or online
| at www.gnu.org/licenses/agpl.html. Removal of this
| copyright header is strictly prohibited without
| written permission from the original author(s).
+--------------------------------------------------------*/
require_once "../maincore.php";
pageAccess('ERRO');
require_once THEMES . "templates/admin_header.php";
$error = \PHPFusion\Errors::getInstance();
if (method_exists($error, "display_administration")) {
    $error->display_administration();
}
require_once THEMES . "templates/footer.php";