code: def lines(self, lines_dict, y='bottom', color='grey', **kwargs):
          '''
          Creates vertical lines in the plot.
  
          :param lines_dict:
              A dictionary of label, x-coordinate pairs.
          :param y:
              May be 'top', 'bottom' or int.
              The y coordinate of the text-labels.
          :param color color:
              The color of the lines.
          '''
          for l, x in lines_dict.items():
              self.line(x, l, y, color, **kwargsf lines(self, lines_dict, y='bottom', color='grey', **kwargs):
          '''
          Creates vertical lines in the plot.
  
          :param lines_dict:
              A dictionary of label, x-coordinate pairs.
          :param y:
              May be 'top', 'bottom' or int.
              The y coordinate of the text-labels.
          :param color color:
              The color of the lines.
          '''
          for l, x in lines_dict.items():
              self.line(x, l, y, color, **kwargs)
docs: Creates vertical lines in the plot.
  
          :param lines_dict:
              A dictionary of label, x-coordinate pairs.
          :param y:
              May be 'top', 'bottom' or int.
              The y coordinate of the text-labels.
          :param color color:
              The color of the lines.