FluidTYPO3\Vhs\Traits\TagViewHelperTrait::renderChildTag PHP Method

    protected function renderChildTag($tagName, $attributes = [], $forceClosingTag = false, $mode = 'none')
    {
        $tagBuilder = clone $this->tag;
        $tagBuilder->reset();
        $tagBuilder->setTagName($tagName);
        $tagBuilder->addAttributes($attributes);
        $tagBuilder->forceClosingTag($forceClosingTag);
        $childTag = $tagBuilder->render();
        if ('append' === $mode || 'prepend' === $mode) {
            $content = $this->tag->getContent();
            if ('append' === $mode) {
                $content = $content . $childTag;
            } else {
                $content = $childTag . $content;
            }
            $this->tag->setContent($content);
        }
        return $childTag;
    }