Adds a URI in the TrackList.

        :param str uri: The uri of the item to add.
        :param str after_track: The identifier of the track
                                after which the new item should be inserted.
        :param bool set_as_current: Whether the newly inserted track
                                    should be considered as the current track.

def AddTrack(self, uri, after_track, set_as_current):
        """Adds a URI in the TrackList.

        :param str uri: The uri of the item to add.
        :param str after_track: The identifier of the track
                                after which the new item should be inserted.
        :param bool set_as_current: Whether the newly inserted track
                                    should be considered as the current track.
        """
        self.iface.AddTrack(uri,
                            convert2dbus(after_track, 'o'),
                            convert2dbus(set_as_current, 'b'))