Contao\ContentTeaser::generate PHP Method

    public function generate()
    {
        $objArticle = \ArticleModel::findPublishedById($this->article);
        if ($objArticle === null) {
            return '';
        }
        // Use findPublished() instead of getRelated()
        $objParent = \PageModel::findPublishedById($objArticle->pid);
        if ($objParent === null) {
            return '';
        }
        $this->objArticle = $objArticle;
        $this->objParent = $objParent;
        return parent::generate();
    }