code: def test_serialize_seriesgroupby():
      gdf = cudf.DataFrame({"a": [1, 2, 3, 4], "b": [5, 1, 2, 5]})
  
      gb = gdf.groupby(["a"]).b
      recreated = gb.__class__.deserialize(*gb.serialize())
      assert_eq(recreated.sum(), gb.sum())
  
imports: import pickle
  import msgpack
  import numpy
  import pandas
  import pytest
  import cudf
  from cudf.testing import _utils
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 19 for calling a global function with example usage: test_serialize_seriesgroupby() without return types