code: def test_golden_pickle_load(self):
      loaded = self._pickle_load_golden("empty")
      self.assertType(loaded, dict)
      self.assertEmpty(loaded)
  
imports: import collections
  import copy
  import pickle
  import threading
  from absl.testing import absltest
  from absl.testing import parameterized
  import cloudpickle
  import dill
  from haiku._src import data_structures
  import jax
  import tree
label_desc: Use image node_id 13 for calling the FlatMappingTest obj's underlying member method code with example usage: obj.test_golden_pickle_load() without return types