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