How to use the netgraph._main.DraggableArtists.__init__ function in netgraph

def __init__(self, *args, **kwargs):
        Graph.__init__(self, *args, **kwargs)
        DraggableArtists.__init__(self, self.node_face_artists.values())

        self._node_to_draggable_artist = self.node_face_artists
        self._draggable_artist_to_node = dict(zip(self.node_face_artists.values(), self.node_face_artists.keys()))

        # trigger resize of labels when canvas size changes
        self.fig.canvas.mpl_connect('resize_event', self._on_resize)