code: def parse_polygon(arg):
      """Parses the polygon or multi-polygon into GeoJSON dict representation.
  
      Args:
          arg: a :class:`fiftyone.core.labels.GeoLocation`,
              :class:`fiftyone.core.labels.GeoLocations`, GeoJSON dict, or list
              of coordinates that define a ``Polygon`` or ``MultiPolygon`` to
              search within
  
      Returns:
          a GeoJSON dict of type ``Polygon`` or ``MultiPolygon``
      """
      orig_arg = arg
      if isinstance(arg, dict):
          arg = arg["coordinates"]
  
      if isinstance(arg, list):
          try:
              arg = fol.GeoLocations(polygons=arg)
          except:
              arg = fol.GeoLocation(polygon=arg)
  
      if isinstance(arg, fol.GeoLocation):
          return {"type": "Polygon", "coordinates": arg.polygon}
  
      if isinstance(arg, fol.GeoLocations):
          return {"type": "MultiPolygon", "coordinates": arg.polygons}
  
      raise ValueError("Unsupported polygon data: %s" % orig_arg)
  
imports: import logging
  import os
  import eta.core.serial
  import eta.core.utils
  import fiftyone.core.fields
  import fiftyone.core.labels
  from fiftyone.core.sample import Sample
  import fiftyone.core.storage
  import fiftyone.core.utils
  import fiftyone.core.validation
  import fiftyone.utils.data
label_desc: Use image node_id 4 for calling a global function with example usage: parse_polygon(arg) and returns: dict, dict