public function initDealerBrands($overrideExisting = true)
    {
        if (null !== $this->collDealerBrands && !$overrideExisting) {
            return;
        }
        $this->collDealerBrands = new ObjectCollection();
        $this->collDealerBrands->setModel('\Dealer\Model\DealerBrand');
    }