docstr: Set the appearance of the gauge's value
  
  The 'bar' property is an instance of Bar
  that may be specified as:
    - An instance of :class:`plotly.graph_objs.indicator.gauge.Bar`
    - A dict of string/value properties that will be passed
      to the Bar constructor
  
      Supported dict properties:
          
          color
              Sets the background color of the arc.
          line
              :class:`plotly.graph_objects.indicator.gauge.ba
              r.Line` instance or dict with compatible
              properties
          thickness
              Sets the thickness of the bar as a fraction of
              the total thickness of the gauge.
  
  Returns
  -------
  plotly.graph_objs.indicator.gauge.Bar
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code: def bar(self):
      """
      Set the appearance of the gauge's value
  
      The 'bar' property is an instance of Bar
      that may be specified as:
        - An instance of :class:`plotly.graph_objs.indicator.gauge.Bar`
        - A dict of string/value properties that will be passed
          to the Bar constructor
  
          Supported dict properties:
  
              color
                  Sets the background color of the arc.
              line
                  :class:`plotly.graph_objects.indicator.gauge.ba
                  r.Line` instance or dict with compatible
                  properties
              thickness
                  Sets the thickness of the bar as a fraction of
                  the total thickness of the gauge.
  
      Returns
      -------
      plotly.graph_objs.indicator.gauge.Bar
      """
      return self["bar"]
  
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 3 for calling the Gauge obj's underlying member method code with example usage: obj.bar() and returns: self