public function addCustomerGroupI18n(ChildCustomerGroupI18n $l)
    {
        if ($l && $locale = $l->getLocale()) {
            $this->setLocale($locale);
            $this->currentTranslations[$locale] = $l;
        }
        if ($this->collCustomerGroupI18ns === null) {
            $this->initCustomerGroupI18ns();
            $this->collCustomerGroupI18nsPartial = true;
        }

        if (!in_array($l, $this->collCustomerGroupI18ns->getArrayCopy(), true)) { // only add it if the **same** object is not already associated
            $this->doAddCustomerGroupI18n($l);
        }

        return $this;
    }