docstr: Tests error about sharding is raised.
docstr_tok: ["Tests","error","about","sharding","is","raised","."]
code: def testShardedError(self, strat):
      """Tests error about sharding is raised."""
      with strat.scope():
          with self.assertRaisesRegex(
              ValueError, "state is sharded, which is not allowed"
          ):
              rng.Generator.from_seed(1234)
  
imports: import functools
  import os
  from absl.testing import parameterized
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.compat import v2_compat
  from tensorflow.python.distribute import combinations
  from tensorflow.python.distribute import multi_process_runner
  from tensorflow.python.distribute import sharded_variable
  from tensorflow.python.distribute import strategy_combinations
  from tensorflow.python.distribute import values
  from tensorflow.python.distribute.coordinator import cluster_coordinator
  from tensorflow.python.distribute.mirrored_strategy import MirroredStrategy
  from tensorflow.python.eager import def_function
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import test_combinations
  from tensorflow.python.framework import test_util
  from tensorflow.python.module import module
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import stateful_random_ops
  from tensorflow.python.platform import test
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import save
  from tensorflow.python.util import deprecation
label_desc: Use image node_id 7 for calling the GeneratorTest obj's underlying member method code with example usage: obj.testShardedError(strat) without return types