code: def load_graph_session_from_pb(pb_file, sess_config, print_op=False):
      """load graph and session from protocol buffer file"""
      graph = load_frozen_graph(pb_file, print_op)
      with graph.as_default():
          sess = get_session(sess_config)
      return graph, sess
  
file_path: delta/delta/utils/model.py
imports: import os
  import numpy
  import hurry.filesize
  from absl import logging
  import delta.compat
  from tensorflow.python.framework import graph_util
label_desc: Use image node_id 9 for calling a global function with example usage: load_graph_session_from_pb(pb_file, sess_config, print_op) and returns: graph,  sess