Sample Model class User { final int id; final String name; final String imageUrl; User({ this.id, this.name, this.imageUrl, }); } class Message { final User sender; final String time; // Would usually be type DateTime or Firebase Timestamp in production apps final String text; final bool isLiked; final bool unread; Message({ this.sender, this.time, this.text, this.isLiked, […]