protected static function getLoaderPrefixes() {
        $loader = static::getLoader();
        $_prefixes = [
            [],
            $loader->getPrefixesPsr4(),
        ];
        $_prefixes = ArrayHelper::merge(...$_prefixes);
        $prefixes = [];
        foreach ($_prefixes as $prefix => $paths) {
            $prefix = trim($prefix, '\\');
            $_paths = [];
            for ($i = 0; $i < count($paths); $i++) { $_paths[] = realpath($paths[$i]); }
            $prefixes[$prefix] = $_paths;
        }
        return $prefixes;
    }