Fix warning after static analyzes

example/lib/main.dart

@@ -55,11 +55,11 @@ class PermissionWidget extends StatefulWidget {
 }
 }
 
 
 class _PermissionState extends State<PermissionWidget> {
 class _PermissionState extends State<PermissionWidget> {
+  _PermissionState(this._permissionGroup);
+
   final PermissionGroup _permissionGroup;
   final PermissionGroup _permissionGroup;
   PermissionStatus _permissionStatus = PermissionStatus.unknown;
   PermissionStatus _permissionStatus = PermissionStatus.unknown;
 
 
-  _PermissionState(this._permissionGroup);
-
   @override
   @override
   void initState() {
   void initState() {
     super.initState();
     super.initState();