code: public FriendGroup getFriendGroupByName(String name) {
  		final RosterGroup g = connection.getRoster().getGroup(name);
  		if (g != null) {
  			return new FriendGroup(this, connection, g);
  		}
  		return addFriendGroup(name);
  	}
docs: Gets a FriendGroup by name, for example "Duo Partners". The name is case
  sensitive! The FriendGroup will be created if it didn't exist yet.
  
  @param name
  The name of your group (case-sensitive)
  @return The corresponding FriendGroup