code: def line_chart(self, x=0, y=1, path=None, width=None, height=None):
      """
      Render a lattice/grid of line charts using :class:`leather.Lattice`.
  
      :param x:
          The name or index of a column to plot as the x axis of the chart.
          Defaults to the first column in the table.
      :param y:
          The name or index of a column to plot as the y axis of the chart.
          Defaults to the second column in the table.
      :param path:
          If specified, the resulting SVG will be saved to this location. If
          :code:`None` and running in IPython, then the SVG will be rendered
          inline. Otherwise, the SVG data will be returned as a string.
      :param width:
          The width of the output SVG.
      :param height:
          The height of the output SVG.
      """
      if type(x) is int:
          x_name = self.column_names[x]
      else:
          x_name = x
  
      if type(y) is int:
          y_name = self.column_names[y]
      else:
          y_name = y
  
      chart = leather.Lattice(shape=leather.Line())
      chart.add_x_axis(name=x_name)
      chart.add_y_axis(name=y_name)
      chart.add_many(self.values(), x=x, y=y, titles=self.keys())
  
      return chart.to_svg(path=path, width=width, height=height)
  
label_desc: Use image node_id 1 for calling a global function with example usage: line_chart(x, y, path, width, height) and returns: chart