public void CommandPart(CommandModel cd)
{
string jid;
if (cd.DataArray.Length >= 2)
jid = cd.DataArray[1];
else
jid = cd.Chat.ID;
XmppGroupChatModel chat = (XmppGroupChatModel)GetChat(jid, ChatType.Group);
if (chat != null) {
MucManager.LeaveRoom(jid, chat.OwnNickname);
}
}