code: def test_composition_dense(self):
      rng = random.PRNGKey(0)
      x1 = random.normal(rng, (2, 3))
      x2 = random.normal(rng, (4, 3))
  
      Block = stax.serial(stax.Dense(256), stax.Relu())
  
      _, _, ker_fn = Block
      _, _, composed_ker_fn = stax.serial(Block, Block)
  
      ker_out = ker_fn(ker_fn(x1))
      composed_ker_out = composed_ker_fn(x1)
      self.assertAllClose(ker_out, composed_ker_out)
  
      ker_out = ker_fn(ker_fn(x1, x2))
      composed_ker_out = composed_ker_fn(x1, x2)
      self.assertAllClose(ker_out, composed_ker_out)
  
imports: import functools
  import itertools
  import random
  from absl.testing import absltest
  from jax import config
  from jax import default_backend
  from jax import jit
  from jax import random
  from jax.example_libraries import stax
  import jax.numpy
  import neural_tangents
  from neural_tangents import stax
  from neural_tangents._src.empirical import _DEFAULT_TESTING_NTK_IMPLEMENTATION
  from tests import test_utils
  import numpy
label_desc: Use image node_id 8 for calling the StaxTest obj's underlying member method code with example usage: obj.test_composition_dense() without return types