code: def proto_unknown(theABF):
      
      abf=ABF(theABF)
      abf.log.info("analyzing as an unknown protocol")
      plot=ABFplot(abf)
      plot.rainbow=False
      plot.title=None
      plot.figure_height,plot.figure_width=SQUARESIZE,SQUARESIZE
      plot.kwargs["lw"]=.5
      plot.figure_chronological()
      plt.gca().set_axis_bgcolor('#AAAAAA') # different background if unknown protocol
      frameAndSave(abf,"UNKNOWN")
docs: protocol: unknown.