code: def _prop_descriptions(self):
      return """\
          radius
              Sets the circle radius (mapbox.layer.paint.circle-
              radius). Has an effect only when `type` is set to
              "circle".
          """
  
imports: from plotly.basedatatypes import BaseLayoutHierarchyType
  import copy
label_desc: Use image node_id 3 for calling the Circle obj's underlying member method code with example usage: obj._prop_descriptions() and returns: str