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