code: def test_ucx_seriesgroupby():
      pytest.importorskip("ucp")
  
      # Repro Issue#3913
      with dask_cuda.LocalCUDACluster(
          n_workers=2, protocol="ucx"
      ) as cluster:
          with Client(cluster):
              df = cudf.DataFrame(
                  {"a": [1, 2, 3, 4], "b": [5, 1, 2, 5]}
              )
              dask_df = dask_cudf.from_cudf(df, npartitions=2)
              dask_df_g = dask_df.groupby(["a"]).b.sum().compute()
  
              assert dask_df_g.name == "b"
  
file_path: cudf/python/dask_cudf/dask_cudf/tests/test_distributed.py
imports: import numba.cuda
  import pytest
  import dask
  from dask import dataframe
  from dask.distributed import Client
  from distributed.utils_test import cleanup, loop, loop_in_thread
  import cudf
  from cudf.testing._utils import assert_eq
  import dask_cudf
label_desc: Use image node_id 4 for calling a global function with example usage: test_ucx_seriesgroupby() without return types