public function process()
    {
        parent::process();

        if (!$this->processValue()) {
            return;
        }

        if (
            $this->required &&
            $this->isSensitive() &&
            $this->selected_page == ''
        ) {
            $this->addMessage($this->getValidationMessage('required'));
        }

        foreach ($this->pages as $page) {
            if ($page->id == $this->selected_page) {
                $page->process();
            }
        }
    }