code: def test_mapreduce(self):
      @utils.mapreduce
      def f(y, x):
          return jnp.square(x + y)
  
      z = f(jnp.ones(shape=(32,)), jnp.ones(shape=(32,)))
      z = jax.device_get(z)
      self.assertEqual(z, 4)
  
file_path: acme/acme/jax/utils_test.py
imports: from acme.jax import utils
  import chex
  import jax
  import jax.numpy
  import numpy
  from absl.testing import absltest
label_desc: Use image node_id 2 for calling the JaxUtilsTest obj's underlying member method code with example usage: obj.test_mapreduce() and returns: jnp