docstr: Tests generator creation, the unseeded case.
code: def testGeneratorCreationUnseeded(self):
      """Tests generator creation, the unseeded case."""
      shape = [2, 3]
      global g_unseeded
      g_unseeded = None
  
      @def_function.function
      def f():
          global g_unseeded
          # defun'ed function should only create variables once
          if g_unseeded is None:
              g_unseeded = (
                  random.Generator.from_non_deterministic_state()
              )
          return g_unseeded.normal(shape)
  
      self.assertAllEqual(shape, f().shape)
  
imports: import os
  import re
  from absl.testing import parameterized
  import numpy
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import config
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.kernel_tests.random import util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gen_random_ops
  from tensorflow.python.ops import gen_stateful_random_ops
  from tensorflow.python.ops import logging_ops
  from tensorflow.python.ops import random_ops_util
  from tensorflow.python.ops import stateful_random_ops
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
label_desc: Use image node_id 15 for calling the StatefulRandomOpsTest obj's underlying member method code with example usage: obj.testGeneratorCreationUnseeded() and returns: g_unseeded