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