code: def test_all_optimizers_coverage(self):
      module = chainer.optimizers
      module_optimizers = []
      for name in dir(module):
          obj = getattr(module, name)
          if isinstance(obj, type) and issubclass(
              obj, chainer.Optimizer
          ):
              module_optimizers.append(name)
  
      assert sorted(_all_optimizers) == sorted(module_optimizers)
  
imports: import pickle
  import unittest
  import numpy
  import six
  import chainer
  from chainer import functions
  from chainer import optimizers
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestAllOptimizersCoverage obj's underlying member method code with example usage: obj.test_all_optimizers_coverage() without return types