lint: misc

Author: fulleni

lib/ads/ad_cache_service.dart

@@ -16,15 +16,16 @@ import 'package:logging/logging.dart';
 /// the cache is cleared (e.g., on a full feed refresh).
 /// {@endtemplate}
 class AdCacheService {
+
+  /// Factory constructor to provide the singleton instance.
+  factory AdCacheService() => _instance;
+  
   /// Private constructor for the singleton pattern.
   AdCacheService._internal() : _logger = Logger('AdCacheService');
 
   /// The single instance of [AdCacheService].
   static final AdCacheService _instance = AdCacheService._internal();
 
-  /// Factory constructor to provide the singleton instance.
-  factory AdCacheService() => _instance;
-
   final Logger _logger;
 
   /// A map to store loaded native ad objects, keyed by their unique ID.