code: def serialize(self):
      header, frames = super().serialize()
      grouping_head, grouping_frames = self.grouping.serialize()
      header["grouping"] = grouping_head
      header["resampler_type"] = pickle.dumps(type(self))
      header["grouping_frames_count"] = len(grouping_frames)
      frames.extend(grouping_frames)
      return header, frames
  
imports: import pickle
  import numpy
  import pandas
  import cudf
  import cudf._lib.labeling
  import cudf.core.index
  from cudf._typing import DataFrameOrSeries
  from cudf.core.groupby.groupby import DataFrameGroupBy, GroupBy, SeriesGroupBy, _Grouping
  from cudf.core.tools.datetimes import _offset_alias_to_code, _unit_dtype_map
label_desc: Use image node_id 5 for calling the _Resampler obj's underlying member method code with example usage: obj.serialize() and returns: header,  frames