code: def combiplot(self, fontsize=8, **kwargs):
          
          ax_list = None
          for i, (label, cycle) in enumerate(self.items()):
              fig = cycle.plot(ax_list=ax_list, label=label, fontsize=fontsize,
                               lw=2.0, marker="o", linestyle="-", show=False)
              ax_list = fig.axes
  
          return fig
docs: Compare multiple cycels on a grid: one subplot per quantity,
          all cycles on the same subplot.
  
          Args:
              fontsize: Legend fontsize.