FluidTYPO3\Vhs\ViewHelpers\Menu\AbstractMenuViewHelper::backupVariables PHP Метод

    public function backupVariables()
    {
        $backups = [$this->arguments['as'], $this->arguments['rootLineAs']];
        foreach ($backups as $var) {
            if (true === $this->templateVariableContainer->exists($var)) {
                $this->backupValues[$var] = $this->templateVariableContainer->get($var);
                $this->templateVariableContainer->remove($var);
            }
        }
    }