added docs

packages/stream_chat_flutter/lib/src/commands_overlay.dart

@@ -2,11 +2,9 @@ import 'package:flutter/material.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 import 'package:stream_chat_flutter/src/extension.dart';
 
+/// Overlay for displaying commands that can be used
 class CommandsOverlay extends StatelessWidget {
-  final BuildContext context;
-  final String text;
-  final ValueChanged<Command> onCommandResult;
-
+  /// Constructor for creating a [CommandsOverlay]
   const CommandsOverlay(
     this.context, {
     required this.text,
@@ -14,9 +12,18 @@ class CommandsOverlay extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  /// Context of the upper tree
+  final BuildContext context;
+
+  /// Query for searching commands
+  final String text;
+
+  /// Callback called when a command is selected
+  final ValueChanged<Command> onCommandResult;
+
   @override
   Widget build(BuildContext otherContext) {
-    var _streamChatTheme = StreamChatTheme.of(context);
+    final _streamChatTheme = StreamChatTheme.of(context);
     final commands = StreamChannel.of(context)
             .channel
             .config

packages/stream_chat_flutter/lib/src/emoji_overlay.dart

@@ -4,11 +4,9 @@ import 'package:stream_chat_flutter/src/emoji/emoji.dart';
 import 'package:stream_chat_flutter/src/extension.dart';
 import 'package:substring_highlight/substring_highlight.dart';
 
+/// Overlay for displaying emoji that can be used
 class EmojiOverlay extends StatelessWidget {
-  final BuildContext context;
-  final String query;
-  final ValueChanged<Emoji> onEmojiResult;
-
+  /// Constructor for creating a [EmojiOverlay]
   const EmojiOverlay(
     this.context, {
     required this.query,
@@ -16,10 +14,19 @@ class EmojiOverlay extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  /// Context of the upper tree
+  final BuildContext context;
+
+  /// Query for searching emoji
+  final String query;
+
+  /// Callback called when an emoji is selected
+  final ValueChanged<Emoji> onEmojiResult;
+
   @override
   Widget build(BuildContext otherContext) {
-    var _streamChatTheme = StreamChatTheme.of(context);
-    var _emojiNames =
+    final _streamChatTheme = StreamChatTheme.of(context);
+    final _emojiNames =
         Emoji.all().where((it) => it.name != null).map((e) => e.name!);
 
     final emojis = _emojiNames

packages/stream_chat_flutter/lib/src/mentions_overlay.dart

@@ -1,15 +1,9 @@
 import 'package:flutter/material.dart';
-import 'package:stream_chat_flutter/src/extension.dart';
 import 'package:stream_chat_flutter/stream_chat_flutter.dart';
 
+/// Overlay for displaying users that can be mentioned
 class MentionsOverlay extends StatelessWidget {
-  final BuildContext context;
-  final String query;
-  final ValueChanged<User?> onMentionResult;
-
-  /// Customize the tile for the mentions overlay
-  final MentionTileBuilder? mentionsTileBuilder;
-
+  /// Constructor for creating a [MentionsOverlay]
   const MentionsOverlay(
     this.context, {
     required this.query,
@@ -18,9 +12,21 @@ class MentionsOverlay extends StatelessWidget {
     Key? key,
   }) : super(key: key);
 
+  /// Context of the upper tree
+  final BuildContext context;
+
+  /// Query for searching users
+  final String query;
+
+  /// Callback called when a user is selected
+  final ValueChanged<User?> onMentionResult;
+
+  /// Customize the tile for the mentions overlay
+  final MentionTileBuilder? mentionsTileBuilder;
+
   @override
   Widget build(BuildContext otherContext) {
-    var _streamChatTheme = StreamChatTheme.of(context);
+    final _streamChatTheme = StreamChatTheme.of(context);
 
     Future<List<Member>>? queryMembers;