Solid angle within the mask as a function of color and magnitude.

def plotSolidAngleCMD(self):
        """
        Solid angle within the mask as a function of color and magnitude.
        """
        msg = "'%s.plotSolidAngleCMD': ADW 2018-05-05"%self.__class__.__name__
        DeprecationWarning(msg)

        import ugali.utils.plotting        
        ugali.utils.plotting.twoDimensionalHistogram('mask', 'color', 'magnitude',
                                                     self.solid_angle_cmd,
                                                     self.roi.bins_color,
                                                     self.roi.bins_mag,
                                                     lim_x = [self.roi.bins_color[0],
                                                              self.roi.bins_color[-1]],
                                                     lim_y = [self.roi.bins_mag[-1],
                                                              self.roi.bins_mag[0]])