code: def test_agg_count_dtype(empty):
      df = cudf.DataFrame({"a": [1, 2, 1], "c": ["a", "b", "c"]})
      if empty:
          df = df.iloc[:0]
      result = df.groupby("a").agg({"c": "count"})
      assert result["c"].dtype == np.dtype("int64")
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_agg_count_dtype(empty) without return types