code: def test_min_empty_string_dtype(func):
      # GH#55619
      pytest.importorskip("pyarrow")
      dtype = "string[pyarrow_numpy]"
      df = DataFrame(
          {"a": ["a"], "b": "a", "c": "a"}, dtype=dtype
      ).iloc[:0]
      result = getattr(df.groupby("a"), func)()
      expected = DataFrame(
          columns=["b", "c"],
          dtype=dtype,
          index=pd.Index([], dtype=dtype, name="a"),
      )
      tm.assert_frame_equal(result, expected)
  
imports: import builtins
  import datetime
  from string import ascii_lowercase
  import numpy
  import pytest
  from pandas._libs.tslibs import iNaT
  import pandas
  from pandas import DataFrame, MultiIndex, Series, Timestamp, date_range, isna
  import pandas._testing
  from pandas.util import _test_decorators
label_desc: Use image node_id 30 for calling a global function with example usage: test_min_empty_string_dtype(func) without return types