public function addDealerContactInfo(ChildDealerContactInfo $l)
    {
        if ($this->collDealerContactInfos === null) {
            $this->initDealerContactInfos();
            $this->collDealerContactInfosPartial = true;
        }

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

        return $this;
    }