$params is passed to ChangeTags::updateTagsWithChecks which defines
$params as string|null, because it goes to change_tag.ct_params
Change-Id: I6df1a2b826a3c1dfcf6c1bbd012895c84878aab5
*
* @param array $tagsToAdd
* @param array $tagsToRemove
- * @param array $params
+ * @param string|null $params
* @param string $reason
* @param User $user
* @return Status
*
* @param array $tagsToAdd
* @param array $tagsToRemove
- * @param array $params
+ * @param string|null $params
* @param string $reason
* @param User $user
* @return Status