FluidTYPO3\Vhs\ViewHelpers\Menu\DeferredViewHelper::render PHP Метод

    public function render()
    {
        $as = $this->arguments['as'];
        if (false === $this->viewHelperVariableContainer->exists(AbstractMenuViewHelper::class, 'deferredArray')) {
            return null;
        }
        if (false === $this->viewHelperVariableContainer->exists(AbstractMenuViewHelper::class, 'deferredString')) {
            return null;
        }
        if (null === $as) {
            $content = $this->viewHelperVariableContainer->get(AbstractMenuViewHelper::class, 'deferredString');
            $this->unsetDeferredVariableStorage();
            return $content;
        } elseif (true === empty($as)) {
            throw new Exception('An "as" attribute was used but was empty - use a proper string value', 1370096373);
        }
        if (true === $this->templateVariableContainer->exists($as)) {
            $backupVariable = $this->templateVariableContainer->get($as);
            $this->templateVariableContainer->remove($as);
        }
        $this->templateVariableContainer->add($as, $this->viewHelperVariableContainer->get(AbstractMenuViewHelper::class, 'deferredArray'));
        $this->unsetDeferredVariableStorage();
        $content = $this->renderChildren();
        $this->templateVariableContainer->remove($as);
        if (true === isset($backupVariable)) {
            $this->templateVariableContainer->add($as, $backupVariable);
        }
        return $content;
    }