code: def framewise(self):
          
          current_frames = [el for f in self.traverse(lambda x: x.current_frame)
                            for el in (f.traverse(lambda x: x, [Element])
                                       if f else [])]
          current_frames = util.unique_iterator(current_frames)
          return any(self.lookup_options(frame, 'norm').options.get('framewise')
                     for frame in current_frames)
docs: Property to determine whether the current frame should have
          framewise normalization enabled. Required for bokeh plotting
          classes to determine whether to send updated ranges for each
          frame.