class_docstr: Complete geometry data for filled polygons over a whole sequence of contour levels.
      
code: def asdict(self):
      # Convert to dict using shallow copy.  dataclasses.asdict uses deep copy.
      return dict(entries(self))
  
imports: from __future__ import annotations
  import logging
  from typing import TYPE_CHECKING, Sequence, Union, cast
  import numpy
  from ..core.property_mixins import FillProps, HatchProps, LineProps
  from ..models.glyphs import MultiLine, MultiPolygons
  from ..models.renderers import ContourRenderer, GlyphRenderer
  from ..models.sources import ColumnDataSource
  from ..palettes import interp_palette
  from ..plotting._renderer import _process_sequence_literals
  from ..util.dataclasses import dataclass, entries
label_desc: Use image node_id 1 for calling the FillData obj's underlying member method code with example usage: obj.asdict() and returns: dict