* @param File $file
* @param array $prop Array of properties to get (in the keys)
* @param ApiResult $result
- * @param array $thumbParams Containing 'width' and 'height' items, or null
+ * @param array|null $thumbParams Containing 'width' and 'height' items, or null
* @param array|bool|string $opts Options for data fetching.
* This is an array consisting of the keys:
* 'version': The metadata version for the metadata option