code: def _get_test_data(self, testing_data, default_values):
      # assumes pairing test-data exists
      test_data = getattr(testing_data, self.data_name)()
  
      if test_data is None:
          raise Exception(
              f"'{self.data_name}' returned None. should be list"
          )
  
      test_data = self._dictify_test_data(test_data)
      test_data = self._pytestify_test_data(test_data, default_values)
  
      return test_data
  
imports: import functools
  import importlib
  import inspect
  import json
  import os
  import subprocess
  import tempfile
  import types
  import warnings
  import pytest
  from matplotlib import pyplot
  import geomstats.backend
  from geomstats.exceptions import AutodiffNotImplementedError
  from geomstats.test.test_case import autodiff_backend
  from geomstats.test.vectorization import test_vectorization
label_desc: Use image node_id 12 for calling the TestFunction obj's underlying member method code with example usage: obj._get_test_data(testing_data, default_values) and returns: test_data