def METHOD_NAME(self, b1, b2):
    if len(self.plot.plots) > 0:
        self.plot.delplot(*list(self.plot.plots.keys()))
    cur_plot = self.plot.plot(
        (b1.plotname + "_y", b2.plotname + "_y"),
        name=self._scatterplot_name,
        type="scatter",
        marker="square",
        color=tuple(choice(COLOR_PALETTE)),
        marker_size=8,
    )
    self.plot.index_axis.title = b1.plotname
    # self.plot.value_axis.title = b2.plotname
    self.plot.title = b1.plotname + " vs. " + b2.plotname
    self.plot_overlay.visible = True
    self.plot.request_redraw()