public function initC2Ms($overrideExisting = true)
    {
        if (null !== $this->collC2Ms && !$overrideExisting) {
            return;
        }

        $collectionClassName = C2MTableMap::getTableMap()->getCollectionClassName();

        $this->collC2Ms = new $collectionClassName;
        $this->collC2Ms->setModel('\Attogram\SharedMedia\Orm\C2M');
    }