How to use the netgraph._main.Graph function in netgraph

artist.set_alpha(self._base_alpha[artist])
        self._selected_artists = []
        self.fig.canvas.draw_idle()


    def _selector_on(self):
        self._rect.set_visible(True)
        xlim = np.sort([self._x0, self._x1])
        ylim = np.sort([self._y0, self._y1])
        self._rect.set_xy((xlim[0],ylim[0] ) )
        self._rect.set_width(np.diff(xlim))
        self._rect.set_height(np.diff(ylim))
        self.fig.canvas.draw_idle()


class InteractiveGraph(Graph, DraggableArtists):

    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)


    def _move(self, event):

        cursor_position = np.array([event.xdata, event.ydata])