code: def testUtilityClipGrads(self):
      g = (jnp.ones(2), (jnp.ones(3), jnp.ones(4)))
      norm = optimizers.l2_norm(g)
  
      ans = optimizers.clip_grads(g, 1.1 * norm)
      expected = g
      self.assertAllClose(ans, expected, check_dtypes=False)
  
      ans = optimizers.l2_norm(optimizers.clip_grads(g, 0.9 * norm))
      expected = 0.9 * norm
      self.assertAllClose(ans, expected, check_dtypes=False)
  
imports: import functools
  from absl.testing import absltest
  import numpy
  import jax.numpy
  import jax._src.test_util
  from jax import jit, grad, jacfwd, jacrev
  from jax import tree_util
  from jax import lax
  from jax.example_libraries import optimizers
  from jax import config
label_desc: Use image node_id 25 for calling the OptimizerTests obj's underlying member method code with example usage: obj.testUtilityClipGrads() without return types