docstr: The 'line' property is an instance of Line
  that may be specified as:
    - An instance of :class:`plotly.graph_objs.sankey.link.Line`
    - A dict of string/value properties that will be passed
      to the Line constructor
  
      Supported dict properties:
          
          color
              Sets the color of the `line` around each
              `link`.
          colorsrc
              Sets the source reference on Chart Studio Cloud
              for  color .
          width
              Sets the width (in px) of the `line` around
              each `link`.
          widthsrc
              Sets the source reference on Chart Studio Cloud
              for  width .
  
  Returns
  -------
  plotly.graph_objs.sankey.link.Line
code: def line(self):
      """
      The 'line' property is an instance of Line
      that may be specified as:
        - An instance of :class:`plotly.graph_objs.sankey.link.Line`
        - A dict of string/value properties that will be passed
          to the Line constructor
  
          Supported dict properties:
  
              color
                  Sets the color of the `line` around each
                  `link`.
              colorsrc
                  Sets the source reference on Chart Studio Cloud
                  for  color .
              width
                  Sets the width (in px) of the `line` around
                  each `link`.
              widthsrc
                  Sets the source reference on Chart Studio Cloud
                  for  width .
  
      Returns
      -------
      plotly.graph_objs.sankey.link.Line
      """
      return self["line"]
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 25 for calling the Link obj's underlying member method code with example usage: obj.line() and returns: self