public function addDealerContactVersion(ChildDealerContactVersion $l)
    {
        if ($this->collDealerContactVersions === null) {
            $this->initDealerContactVersions();
            $this->collDealerContactVersionsPartial = true;
        }

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

        return $this;
    }