def METHOD_NAME(self):
    """(DEPRECATED) player playlist
    Player SHOULD not know the existence of playlist. However, in the
    very beginning, the player depends on playlist and listen playlist's
    signal. Other programs may depends on the playlist property and
    we keep it for backward compatibility.
    TODO: maybe add a DeprecationWarning in v3.8.
    :return: :class:`.Playlist`
    """
    return self._playlist