code: def test_groupby_aggregate_updating(stream):
      df = cudf.DataFrame({"x": [1, 2, 3], "y": [4, 5, 6]})
      sdf = DataFrame(example=df, stream=stream)
  
      assert sdf.groupby("x").y.mean()._stream_type == "updating"
      assert sdf.x.sum()._stream_type == "updating"
      assert (sdf.x.sum() + 1)._stream_type == "updating"
  
imports: import json
  import operator
  import numpy
  import pandas
  import pytest
  from dask.dataframe.utils import assert_eq
  from distributed import Client
  from streamz import Stream
  from streamz.dask import DaskStream
  from streamz.dataframe import Aggregation, DataFrame, DataFrames, Series
label_desc: Use image node_id 30 for calling a global function with example usage: test_groupby_aggregate_updating(stream) without return types