public static function inject($injector, $package)
    {
        $dir = __DIR__."/../../$package/src/Injectors";
        $files = is_dir($dir) ? scandir($dir) : [];

        foreach ($files as $file) {
            if (substr($file, 0, -4) == $injector and substr($file, -4) == '.php') {
                $file = $dir.'/'.$file;

                return include $file;
            }
        }

        return '';
    }