Craft\SeomaticService::renderMainEntityOfPage PHP Method

    public function renderMainEntityOfPage($metaVars, $locale, $isPreview = false)
    {
        $htmlText = "";
        if (isset($metaVars['seomaticMainEntityOfPage'])) {
            $this->sanitizeMetaVars($metaVars);
            $htmlText = $this->renderJSONLD($metaVars['seomaticMainEntityOfPage'], $isPreview);
        }
        return $htmlText;
    }