//Create a list with messages
   final List<MessageWidget> _messageList = [
      MessageWidget(
          content: "Hi, Bill! This is the simplest example ever.",
          ownerType: OwnerType.sender,
          ownerName: "Higor Lapa"),
      MessageWidget(
          content:
              "Let's make it better , Higor. Custom font size and text color",
          textColor: Colors.black38,
          fontSize: 18.0,
          ownerType: OwnerType.receiver,
          ownerName: "Bill Gates"),
  ];

  final ScrollController _scrollController = ScrollController();

//Place the widget inside your build function
ChatList(
  children: _messageList,
  scrollController: _scrollController
),