public function addDealerContactInfoVersion(ChildDealerContactInfoVersion $l)
    {
        if ($this->collDealerContactInfoVersions === null) {
            $this->initDealerContactInfoVersions();
            $this->collDealerContactInfoVersionsPartial = true;
        }

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

        return $this;
    }