code: def plots(self):
          
          plotArea = self._chartSpace.chart.plotArea
          return _Plots(plotArea, self)
docs: The sequence of plots in this chart. A plot, called a *chart group*
          in the Microsoft API, is a distinct sequence of one or more series
          depicted in a particular charting type. For example, a chart having
          a series plotted as a line overlaid on three series plotted as
          columns would have two plots; the first corresponding to the three
          column series and the second to the line series. Plots are sequenced
          in the order drawn, i.e. back-most to front-most. Supports *len()*,
          membership (e.g. ``p in plots``), iteration, slicing, and indexed
          access (e.g. ``plot = plots[i]``).