private void GetChatGroups()
{
Stopwatch sw = Stopwatch.StartNew();
_iPhone = new iPhone();
_iPhone.GetContacts(_backup);
TraceInformation("GetAddressList {0} ms", sw.ElapsedMilliseconds);
//List<iPhoneBackup.Message> messages = _backup.GetAllMessages();
sw.Restart();
_chats = _backup.GetChats();
FillMessageGroupsListbox(_chats);
TraceInformation("{1} chats: {0} ms", sw.ElapsedMilliseconds, _chats.Count);
}