updated project style guidelines

lib/model/chatList/chatListProps.dart

@@ -11,9 +11,7 @@ class ChatListProps extends DataHolder {
   GetRoomResponse get getRoomsResponse => _getRoomResponse!;
 
   @override
-  List<ApiResponse?> properties() {
-    return [_getRoomResponse];
-  }
+  List<ApiResponse?> properties() => [_getRoomResponse];
 
   @override
   void run({renew}) {
@@ -27,4 +25,4 @@ class ChatListProps extends DataHolder {
     );
   }
 
-}
+}

lib/model/chatList/chatProps.dart

@@ -11,15 +11,13 @@ class ChatProps extends DataHolder {
   GetChatResponse get getChatResponse => _getChatResponse!;
 
   @override
-  List<ApiResponse?> properties() {
-    return [_getChatResponse];
-  }
+  List<ApiResponse?> properties() => [_getChatResponse];
 
   @override
   void run() {
     notifyListeners();
     if(_queryToken.isEmpty) return;
-    DateTime requestStart = DateTime.now();
+    var requestStart = DateTime.now();
 
     GetChatCache(
       chatToken: _queryToken,
@@ -39,7 +37,5 @@ class ChatProps extends DataHolder {
     run();
   }
 
-  String currentToken() {
-    return _queryToken;
-  }
-}
+  String currentToken() => _queryToken;
+}