}
/**
- * @param string|bool $domain Domain (usually wiki ID). false for the default (normally the
- * current wiki's domain).
+ * @param string|null|false $domain Domain (usually wiki ID). false for the default (normally
+ * the current wiki's domain).
* @return LockManagerGroup
*/
public function getLockManagerGroup( $domain = false ) : LockManagerGroup {
- if ( $domain === false ) {
+ if ( $domain === false || $domain === null ) {
$domain = $this->defaultDomain;
}