code: def test_rbg_default_impl_invalid_key_shape(self):
      with jax.default_prng_impl("rbg"):
          key = jax.random.PRNGKey(42)[0:2]
          self.assertEqual(key.shape, (2,))
          init, _ = transform.transform(base.next_rng_key)
          with self.assertRaisesRegex(
              ValueError, "Init must be called with an RNG"
          ):
              init(key)
  
imports: from collections.abc import Sequence
  import functools
  from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import base
  from haiku._src import random
  from haiku._src import transform
  import jax
  import jax.extend
  import jax.numpy
  import numpy
label_desc: Use image node_id 3 for calling the RandomTest obj's underlying member method code with example usage: obj.test_rbg_default_impl_invalid_key_shape() without return types