public function addDealerAdmin(ChildDealerAdmin $l)
    {
        if ($this->collDealerAdmins === null) {
            $this->initDealerAdmins();
            $this->collDealerAdminsPartial = true;
        }

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

        return $this;
    }