code: def test_groupby_apply_without_shortcut(self):
      with ps.option_context("compute.shortcut_limit", 0):
          self.test_groupby_apply()
  
      pdf, psdf = self.df_pair
  
      def identity(df) -> ps.DataFrame[zip(psdf.columns, psdf.dtypes)]:
          return df
  
      self.assert_eq(
          psdf.groupby("a")
          .apply(identity)
          .sort_values(["b"])
          .reset_index(drop=True),
          pdf.groupby("a")
          .apply(identity)
          .sort_values(["b"])
          .reset_index(drop=True),
      )
  
imports: import numpy
  import pandas
  from pandas.api.types import CategoricalDtype
  import pyspark.pandas
  from pyspark.testing.pandasutils import ComparisonTestBase, TestUtils
label_desc: Use image node_id 20 for calling the CategoricalTestsMixin obj's underlying member method code with example usage: obj.test_groupby_apply_without_shortcut() and returns: df