use a better variable name

lib/ui/viewer/gallery/component/group/lazy_group_gallery.dart

@@ -56,7 +56,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
 
   late Logger _logger;
 
-  late List<EnteFile> _files;
+  late List<EnteFile> _filesInGroup;
   late StreamSubscription<FilesUpdatedEvent>? _reloadEventSubscription;
   late StreamSubscription<int> _currentIndexSubscription;
   bool? _shouldRender;
@@ -75,7 +75,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
   void _init() {
     _logger = Logger("LazyLoading_${widget.logTag}");
     _shouldRender = true;
-    _files = widget.files;
+    _filesInGroup = widget.files;
     _areAllFromGroupSelectedNotifier.value = _areAllFromGroupSelected();
     _reloadEventSubscription = widget.reloadEvent?.listen((e) => _onReload(e));
 
@@ -101,11 +101,11 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
   }
 
   Future _onReload(FilesUpdatedEvent event) async {
-    if (_files.isEmpty) {
+    if (_filesInGroup.isEmpty) {
       return;
     }
     final DateTime groupDate =
-        DateTime.fromMicrosecondsSinceEpoch(_files[0].creationTime!);
+        DateTime.fromMicrosecondsSinceEpoch(_filesInGroup[0].creationTime!);
     // iterate over  files and check if any of the belongs to this group
     final anyCandidateForGroup = event.updatedFiles.any((file) {
       final fileDate = DateTime.fromMicrosecondsSinceEpoch(file.creationTime!);
@@ -147,7 +147,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
         final galleryState = context.findAncestorStateOfType<GalleryState>();
         if (galleryState?.mounted ?? false) {
           galleryState!.setState(() {});
-          _files = result.files;
+          _filesInGroup = result.files;
         }
       } else if (kDebugMode) {
         debugPrint("Unexpected event ${event.type.name}");
@@ -167,7 +167,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
   @override
   void didUpdateWidget(LazyGroupGallery oldWidget) {
     super.didUpdateWidget(oldWidget);
-    if (!listEquals(_files, widget.files)) {
+    if (!listEquals(_filesInGroup, widget.files)) {
       _reloadEventSubscription?.cancel();
       _init();
     }
@@ -175,7 +175,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
 
   @override
   Widget build(BuildContext context) {
-    if (_files.isEmpty) {
+    if (_filesInGroup.isEmpty) {
       return const SizedBox.shrink();
     }
     return Column(
@@ -185,7 +185,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
           children: [
             if (widget.enableFileGrouping)
               GroupHeaderWidget(
-                timestamp: _files[0].creationTime!,
+                timestamp: _filesInGroup[0].creationTime!,
                 gridSize: widget.photoGridSize,
               ),
             Expanded(child: Container()),
@@ -221,7 +221,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
                               ),
                               onTap: () {
                                 widget.selectedFiles?.toggleGroupSelection(
-                                  _files.toSet(),
+                                  _filesInGroup.toSet(),
                                 );
                               },
                             );
@@ -232,7 +232,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
         _shouldRender!
             ? GroupGallery(
                 photoGridSize: widget.photoGridSize,
-                files: _files,
+                files: _filesInGroup,
                 tag: widget.tag,
                 asyncLoader: widget.asyncLoader,
                 selectedFiles: widget.selectedFiles,
@@ -241,7 +241,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
             // todo: perf eval should we have separate PlaceHolder for Groups
             //  instead of creating a large cached view
             : PlaceHolderGridViewWidget(
-                _files.length,
+                _filesInGroup.length,
                 widget.photoGridSize,
               ),
       ],
@@ -251,7 +251,7 @@ class _LazyGroupGalleryState extends State<LazyGroupGallery> {
   void _selectedFilesListener() {
     if (widget.selectedFiles == null) return;
     _areAllFromGroupSelectedNotifier.value =
-        widget.selectedFiles!.files.containsAll(_files.toSet());
+        widget.selectedFiles!.files.containsAll(_filesInGroup.toSet());
 
     //Can remove this if we decide to show select all by default for all galleries
     if (widget.selectedFiles!.files.isEmpty && !widget.showSelectAllByDefault) {