public function addDealerContentVersion(ChildDealerContentVersion $l)
    {
        if ($this->collDealerContentVersions === null) {
            $this->initDealerContentVersions();
            $this->collDealerContentVersionsPartial = true;
        }

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

        return $this;
    }