code: def _has_no_variables(sess: session.Session) -> bool:
      """Determines if the graph has any variables.
  
      Args:
        sess: TensorFlow Session.
  
      Returns:
        Bool.
      """
      for op in sess.graph.get_operations():
          if op.type.startswith("Variable") or op.type.endswith(
              "VariableOp"
          ):
              return False
      return True
  
imports: import argparse
  import re
  import sys
  from typing import List, Optional, Union
  from absl import app
  from google.protobuf import text_format
  from tensorflow.core.framework import graph_pb2
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.core.protobuf import saver_pb2
  from tensorflow.python.checkpoint import checkpoint_management
  from tensorflow.python.client import session
  from tensorflow.python.framework import convert_to_constants
  from tensorflow.python.framework import importer
  from tensorflow.python.platform import gfile
  from tensorflow.python.saved_model import loader
  from tensorflow.python.saved_model import tag_constants
  from tensorflow.python.tools import saved_model_utils
  from tensorflow.python.training import py_checkpoint_reader
  from tensorflow.python.training import saver
label_desc: Use image node_id 1 for calling a global function with example usage: _has_no_variables(sess) and returns: True, False