public function initMedias($overrideExisting = true)
    {
        if (null !== $this->collMedias && !$overrideExisting) {
            return;
        }

        $collectionClassName = MediaTableMap::getTableMap()->getCollectionClassName();

        $this->collMedias = new $collectionClassName;
        $this->collMedias->setModel('\Attogram\SharedMedia\Orm\Media');
    }