* @param string $table
* @param string $idField
* @param string $nameField
- * @param callable $normalizationCallback Normalization to be applied to names before being
+ * @param callable|null $normalizationCallback Normalization to be applied to names before being
* saved or queried. This should be a callback that accepts and returns a single string.
* @param bool|string $wikiId The ID of the target wiki database. Use false for the local wiki.
- * @param callable $insertCallback Callback to change insert fields accordingly.
+ * @param callable|null $insertCallback Callback to change insert fields accordingly.
* This parameter was introduced in 1.32
*/
public function __construct(