channel_list.dart

Widget build(BuildContext context) {
  return Scaffold(
    //backgroundColor: Colors.white,
    body: ChannelsBloc(
      child: ChannelListView(
        onChannelTap: onItemTap != null
            ? (channel, _) {
                onItemTap(channel);
              }
            : null,
        filter: {
          'members': {
            '\$in': [StreamChat.of(context).user.id],
          }
        },
        sort: [SortOption('last_message_at')],
        pagination: PaginationParams(
          limit: 20,
        ),
        channelWidget: ChannelPage(),
      ),
    ),
  );
}