code: def bicycling_layer():
      """
      Bicycling layer.
  
      Adds cycle routes and decreases the weight of main routes
      on the map.
  
      :returns:
          A :class:`gmaps.Bicycling` widget.
  
      :Examples:
  
      >>> fig = gmaps.figure()
      >>> fig.add_layer(gmaps.bicycling_layer())
      """
      return Bicycling()
  
imports: import ipywidgets
  from traitlets import Unicode
  from .maps import GMapsWidgetMixin
label_desc: Use image node_id 1 for calling a global function with example usage: bicycling_layer() and returns: Bicycling