code: def test_utility_copy_singlearg(self, x):
      new_x = copy(x)
      self.assertTrue(new_x == x and isinstance(new_x, type(x)))
  
file_path: flax/tests/core/core_frozen_dict_test.py
imports: import jax
  from absl.testing import absltest, parameterized
  from flax.core import FrozenDict, copy, freeze, pop, pretty_repr, unfreeze
label_desc: Use image node_id 12 for calling the FrozenDictTest obj's underlying member method code with example usage: obj.test_utility_copy_singlearg(x) without return types