def METHOD_NAME(self, vmin, vmax):
    linthresh = self._linthresh
    if vmax < vmin:
        vmin, vmax = vmax, vmin
    if -linthresh <= vmin < vmax <= linthresh:
        # only the linear range is present
        return sorted({vmin, 0, vmax})
    return super().METHOD_NAME(vmin, vmax)