code: def testFreezeGraphV1(self):
      self._testFreezeGraph(saver_pb2.SaverDef.V1)
  
imports: import os
  import re
  from absl.testing import parameterized
  from tensorflow.core.example import example_pb2
  from tensorflow.core.framework import graph_pb2
  from tensorflow.core.protobuf import saver_pb2
  from tensorflow.python.client import session
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import graph_io
  from tensorflow.python.framework import importer
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import nn
  from tensorflow.python.ops import parsing_ops
  from tensorflow.python.ops import partitioned_variables
  from tensorflow.python.ops import variable_scope
  from tensorflow.python.ops import variable_v1
  from tensorflow.python.ops import variables
  from tensorflow.python.platform import test
  from tensorflow.python.saved_model import builder
  from tensorflow.python.saved_model import signature_constants
  from tensorflow.python.saved_model import signature_def_utils
  from tensorflow.python.saved_model import tag_constants
  from tensorflow.python.tools import freeze_graph
  from tensorflow.python.training import saver
label_desc: Use image node_id 4 for calling the FreezeGraphTest obj's underlying member method code with example usage: obj.testFreezeGraphV1() without return types