bugfix different declaration

core/UI/Widget/DataTable/DataTable.php

@@ -93,7 +93,7 @@ class DataTable extends BaseContainer implements \ThurData\Servers\KerioEmail\Co
         
     }
 
-    public function setName($name)
+    public function setName($name = null)
     {
         $this->name = $name;
         return $this;