public function initAttributeTypeAvMetas($overrideExisting = true)
    {
        if (null !== $this->collAttributeTypeAvMetas && !$overrideExisting) {
            return;
        }
        $this->collAttributeTypeAvMetas = new ObjectCollection();
        $this->collAttributeTypeAvMetas->setModel('\AttributeType\Model\AttributeTypeAvMeta');
    }