protected function _getHash($version, $image) {
		if (!empty($version)) {
			$hash = Configure::read('FileStorage.imageHashes.' . $image['model'] . '.' . $version);
			if (empty($hash)) {
				throw new InvalidArgumentException(sprintf('No valid version key (Identifier: `%s` Key: `%s`) passed!', @$image['model'], $version));
			}

			return $hash;
		}

		return null;
	}