code: def _CheckOptimizer(
      self, optimizer, loss, x0, num_steps, *args, **kwargs
  ):
      self._CheckFuns(optimizer, loss, x0, *args)
      self._CheckRun(optimizer, loss, x0, num_steps, *args, **kwargs)
  
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 1 for calling the OptimizerTests obj's underlying member method code with example usage: obj._CheckOptimizer(optimizer, loss, x0, num_steps) without return types