chore(flutter): add debug props

Author: GroovinChip

packages/stream_chat_flutter/lib/src/message_widget/reactions/desktop_reactions_builder.dart

@@ -1,9 +1,12 @@
 import 'package:collection/collection.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_portal/flutter_portal.dart';
 import 'package:stream_chat_flutter/src/utils/extensions.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
+// ignore_for_file: cascade_invocations
+
 /// {@template desktopReactionsBuilder}
 /// Builds a list of reactions to a message on desktop & web.
 ///
@@ -37,6 +40,29 @@ class DesktopReactionsBuilder extends StatefulWidget {
   @override
   State<DesktopReactionsBuilder> createState() =>
       _DesktopReactionsBuilderState();
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    properties.add(
+      DiagnosticsProperty<bool>(
+        'shouldShowReactions',
+        shouldShowReactions,
+      ),
+    );
+    properties.add(
+      DiagnosticsProperty<Message>('message', message),
+    );
+    properties.add(
+      DiagnosticsProperty<StreamMessageThemeData>(
+        'messageTheme',
+        messageTheme,
+      ),
+    );
+    properties.add(
+      DiagnosticsProperty<BorderSide?>('borderSide', borderSide),
+    );
+  }
 }
 
 class _DesktopReactionsBuilderState extends State<DesktopReactionsBuilder> {