class_docstr: Common tests for Sonnet optimizers.
code: def make_optimizer(self, *args, **kwargs):
      raise NotImplementedError()
  
imports: import itertools
  from absl.testing import parameterized
  import numpy
  from sonnet.src import base
  from sonnet.src import test_utils
  import tensorflow
  import tree
label_desc: Use image node_id 1 for calling the OptimizerTestBase obj's underlying member method code with example usage: obj.make_optimizer() without return types