code: def testGetterSetterInterface(self):
      def f(x, y):
          return 3
  
      k = "blah"
      registry.Registries.optimizers[k] = f
      self.assertEqual(registry.optimizer(k), f)
      self.assertEqual(registry.Registries.optimizers[k], f)
      self.assertEqual(
          registry.Registries.optimizers[k], registry.optimizer(k)
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.utils import registry
  from tensor2tensor.utils import t2t_model
  import tensorflow.compat.v1
label_desc: Use image node_id 7 for calling the OptimizerRegistryTest obj's underlying member method code with example usage: obj.testGetterSetterInterface() and returns: int