code: def mmGetPlotUnionSDRActivity(self, title="Union SDR Activity Raster",
                                  showReset=False, resetShading=0.25):
      
      unionSDRTrace = self.mmGetTraceUnionSDR().data
      columnCount = self.getNumColumns()
      activityType = "Union SDR Activity"
      return self.mmGetCellTracePlot(unionSDRTrace, columnCount, activityType,
                                     title=title, showReset=showReset,
                                     resetShading=resetShading)
docs: Returns plot of the activity of union SDR bits.
      @param title an optional title for the figure
      @param showReset if true, the first set of activities after a reset
                          will have a gray background
      @param resetShading If showReset is true, this float specifies the
      intensity of the reset background with 0.0 being white and 1.0 being black
      @return (Plot) plot