Pimcore\Model\Document\Page::getPersonaElementPrefix PHP Method

    public function getPersonaElementPrefix($personaId = null)
    {
        $prefix = null;
        if (!$personaId) {
            $personaId = $this->getUsePersona();
        }
        if ($personaId) {
            $prefix = "persona_-" . $personaId . "-_";
        }
        return $prefix;
    }