def addScalarBar(self, actor=None, c=None, title="", horizontal=False, vmin=None, vmax=None):
        """Add a 2D scalar bar for the specified actor.

        If `actor` is ``None`` will add it to the last actor in ``self.actors``.

        .. hint:: |mesh_bands| |mesh_bands.py|_
        """
        return addons.addScalarBar(actor, c, title, horizontal, vmin, vmax)