private function getObjectVersion($id = null) {

		if(!empty($id) && !empty($this->versionedIds[$id])) {
			return $this->versionedIds[$id];
		}

		$date_format = 'dHis';
		// Use current time so that object version is unique
		$time = current_time('timestamp');

		$object_version = date($date_format, $time).'/';
		$object_version = apply_filters('as3cf_get_object_version_string', $object_version);

		if(!empty($id)) {
			$this->versionedIds[$id] = $object_version;
		}

		return $object_version;
	}