public function addDealerContact(ChildDealerContact $l)
    {
        if ($this->collDealerContacts === null) {
            $this->initDealerContacts();
            $this->collDealerContactsPartial = true;
        }

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

        return $this;
    }