fix analysis

packages/stream_chat_flutter/lib/src/channel_header.dart

@@ -94,7 +94,7 @@ class ChannelHeader extends StatelessWidget implements PreferredSizeWidget {
   /// Subtitle widget
   final Widget? subtitle;
 
-  // Whether the title should be centered
+  /// Whether the title should be centered
   final bool? centerTitle;
 
   /// Leading widget

packages/stream_chat_flutter/lib/src/message_list_view.dart

@@ -529,6 +529,7 @@ class _MessageListViewState extends State<MessageListView> {
                         return ((index + 2) * 2) - 1;
                       }
                     }
+                    return null;
                   },
 
                   // Item Count -> 8 (1 parent, 2 header+footer, 2 top+bottom, 3 messages)

packages/stream_chat_localizations/lib/src/stream_chat_localizations.dart

@@ -74,6 +74,8 @@ GlobalStreamChatLocalizations? getStreamChatTranslation(Locale locale) {
       return const StreamChatLocalizationsKo();
     case 'pt':
       return const StreamChatLocalizationsPt();
+    default:
+      return null;
   }
 }