code: def testSgdClosure(self):
      def loss(y, x):
          return y**2 * x**2
  
      x0 = 1.0
      y = 1.0
      num_iters = 20
      step_size = 0.1
      partial_loss = functools.partial(loss, y)
      self._CheckRun(
          optimizers.sgd, partial_loss, x0, num_iters, step_size
      )
  
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 11 for calling the OptimizerTests obj's underlying member method code with example usage: obj.testSgdClosure() and returns: unknown