channel_page.dart

Widget build(BuildContext context) {
  return Scaffold(
    appBar: ChannelHeader(
      showBackButton: showBackButton,
    ),
    body: Column(
      children: <Widget>[
        Expanded(
          child: MessageListView(),
        ),
        MessageInput(
          disableAttachments: true,
        ),
      ],
    ),
  );
}