docs: def updateSpiketrace(self, xdata, ydata, plotname=None):
          """Updates the spike trace
  
          :param xdata: index values
          :type xdata: numpy.ndarray
          :param ydata: values to plot
          :type ydata: numpy.ndarray
          """
          if plotname is None:
              plotname = self.responsePlots.keys()[0]
  
          if len(ydata.shape) == 1:
              self.responsePlots[plotname].updateData(axeskey='response', x=xdata, y=ydata)
          else:
              self.responsePlots[plotname].addTraces(xdata, ydata)