docstr: The 'line' property is an instance of Line
  that may be specified as:
    - An instance of :class:`plotly.graph_objs.parcoords.unselected.Line`
    - A dict of string/value properties that will be passed
      to the Line constructor
  
      Supported dict properties:
  
          color
              Sets the base color of unselected lines. in
              connection with `unselected.line.opacity`.
          opacity
              Sets the opacity of unselected lines. The
              default "auto" decreases the opacity smoothly
              as the number of lines increases. Use 1 to
              achieve exact `unselected.line.color`.
  
  Returns
  -------
  plotly.graph_objs.parcoords.unselected.Line
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code: def line(self):
      """
      The 'line' property is an instance of Line
      that may be specified as:
        - An instance of :class:`plotly.graph_objs.parcoords.unselected.Line`
        - A dict of string/value properties that will be passed
          to the Line constructor
  
          Supported dict properties:
  
              color
                  Sets the base color of unselected lines. in
                  connection with `unselected.line.opacity`.
              opacity
                  Sets the opacity of unselected lines. The
                  default "auto" decreases the opacity smoothly
                  as the number of lines increases. Use 1 to
                  achieve exact `unselected.line.color`.
  
      Returns
      -------
      plotly.graph_objs.parcoords.unselected.Line
      """
      return self["line"]
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 1 for calling the Unselected obj's underlying member method code with example usage: obj.line() and returns: self