code: def draw_line(self, ax, line, force_trans=None):
          
          coordinates, data = self.process_transform(line.get_transform(),
                                                     ax, line.get_xydata(),
                                                     force_trans=force_trans)
          linestyle = utils.get_line_style(line)
          if linestyle['dasharray'] is None:
              linestyle = None
          markerstyle = utils.get_marker_style(line)
          if (markerstyle['marker'] in ['None', 'none', None]
                  or markerstyle['markerpath'][0].size == 0):
              markerstyle = None
          label = line.get_label()
          if markerstyle or linestyle:
              self.renderer.draw_marked_line(data=data, coordinates=coordinates,
                                             linestyle=linestyle,
                                             markerstyle=markerstyle,
                                             label=label,
                                             mplobj=line)
docs: Process a matplotlib line and call renderer.draw_line