public function addSmartyFilterI18n(ChildSmartyFilterI18n $l)
    {
        if ($l && $locale = $l->getLocale()) {
            $this->setLocale($locale);
            $this->currentTranslations[$locale] = $l;
        }
        if ($this->collSmartyFilterI18ns === null) {
            $this->initSmartyFilterI18ns();
            $this->collSmartyFilterI18nsPartial = true;
        }

        if (!in_array($l, $this->collSmartyFilterI18ns->getArrayCopy(), true)) { // only add it if the **same** object is not already associated
            $this->doAddSmartyFilterI18n($l);
        }

        return $this;
    }