docs: def polygon_filter_add(self, filt):
          """Associate a Polygon Filter with this instance
  
          Parameters
          ----------
          filt: int or instance of `PolygonFilter`
              The polygon filter to add
          """
          if not isinstance(filt, (PolygonFilter, int, float)):
              msg = "`filt` must be a number or instance of PolygonFilter!"
              raise ValueError(msg)
  
          if isinstance(filt, PolygonFilter):
              uid = filt.unique_id
          else:
              uid = int(filt)
          # append item
          self.config["filtering"]["polygon filters"].append(uid)