code: def testFSPath(self):
      checkpoint_dir = pathlib.Path(self.get_temp_dir())
      with self.cached_session() as session:
          v1, v2, v3, v4 = _create_checkpoints(
              session, checkpoint_dir
          )  # pylint: disable=unused-variable
  
      reader = checkpoint_utils.load_checkpoint(checkpoint_dir)
      self.assertAllEqual(reader.get_tensor("var1"), v1)
  
      self.assertAllEqual(
          checkpoint_utils.load_variable(checkpoint_dir, "var1"), v1
      )
  
      self.assertEqual(
          checkpoint_utils.list_variables(checkpoint_dir),
          [
              ("useful_scope/var4", [9, 9]),
              ("var1", [1, 10]),
              ("var2", [10, 10]),
              ("var3", [100, 100]),
          ],
      )
  
imports: import os
  import pathlib
  import time
  import numpy
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.checkpoint import checkpoint
  from tensorflow.python.client import session
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import init_ops
  from tensorflow.python.ops import partitioned_variables
  from tensorflow.python.ops import resource_variable_ops
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import gfile
  from tensorflow.python.platform import test
  from tensorflow.python.training import checkpoint_utils
  from tensorflow.python.training import saver
label_desc: Use image node_id 5 for calling the CheckpointsTest obj's underlying member method code with example usage: obj.testFSPath() without return types