lib/components/web/widgets/section/Section.php
public function generateStart()
    {
        $parts = [];
        $parts[] = Html::tag('div', '', ['id' => 'section-' . $this->systemId, 'class' => 'scroll-mark']);
        $parts[] = parent::generateStart();

        return implode('', $parts);
    }
public function generateStart()
    {
        $parts = [];
        $parts[] = Html::tag('div', '', ['id' => 'section-' . $this->systemId, 'class' => 'scroll-mark']);
        $parts[] = parent::generateStart();

        return implode('', $parts);
    }
[[@doctodo method_description:generateStart]].

@return [[@doctodo return_type:generateStart]] [[@doctodo return_description:generateStart]]