public function addDealerShedules(ChildDealerShedules $l)
    {
        if ($this->collDealerSheduless === null) {
            $this->initDealerSheduless();
            $this->collDealerShedulessPartial = true;
        }

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

        return $this;
    }