code: def test_batchapply_accepts_none(self):
      def raises(a, b):
          if a is not None:
              raise ValueError("a must be None.")
          if len(b.shape) != 2:
              raise ValueError("b must be shape 2")
          return 3 * b
  
      out = basic.BatchApply(raises)(None, jnp.ones([2, 3, 4]))
      np.testing.assert_array_equal(out, 3 * jnp.ones([2, 3, 4]))
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import base
  from haiku._src import basic
  from haiku._src import test_utils
  from haiku._src import transform
  import jax
  from jax import random
  import jax.numpy
  import numpy
label_desc: Use image node_id 13 for calling the BasicTest obj's underlying member method code with example usage: obj.test_batchapply_accepts_none() and returns: unknown