code: def test_frozen_dict_repr(self):
      expected = """FrozenDict({
      a: 1,
      b: {
          c: 2,
          d: {},
      },
  })"""
  
      xs = FrozenDict({"a": 1, "b": {"c": 2, "d": {}}})
      self.assertEqual(repr(xs), expected)
      self.assertEqual(repr(FrozenDict()), "FrozenDict({})")
  
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 7 for calling the FrozenDictTest obj's underlying member method code with example usage: obj.test_frozen_dict_repr() without return types