code: public FriendGroup addFriendGroup(String name) {
  		final RosterGroup g = connection.getRoster().createGroup(name);
  		if (g != null) {
  			return new FriendGroup(this, connection, g);
  		}
  		return null;
  	}
docs: Creates a new FriendGroup. If this FriendGroup contains no Friends when
  you logout it will be erased from the server.
  
  @param name
  The name of this FriendGroup
  @return The new FriendGroup or null if a FriendGroup with this name
  already exists.