code: def _get_ops_in_metagraph(meta_graph_def):
      """Returns a set of the ops in the MetaGraph.
  
      Returns the set of all the ops used in the MetaGraphDef indicated by the
      tag_set stored in SavedModel directory.
  
      Args:
        meta_graph_def: MetaGraphDef to list the ops of.
  
      Returns:
        A set of ops.
      """
      return set(
          meta_graph_lib.ops_used_by_graph_def(meta_graph_def.graph_def)
      )
  
imports: import argparse
  import platform
  import ast
  import os
  import re
  from absl import app
  from absl import flags
  from absl.flags import argparse_flags
  import numpy
  from tensorflow.core.example import example_pb2
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.debug.wrappers import local_cli_wrapper
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import function
  from tensorflow.python.framework import meta_graph
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import load_options
  from tensorflow.python.saved_model import loader
  from tensorflow.python.saved_model import save
  from tensorflow.python.saved_model import signature_constants
  from tensorflow.python.tools import saved_model_aot_compile
  from tensorflow.python.tools import saved_model_utils
  from tensorflow.python.tpu import tpu
  from tensorflow.python.util.compat import collections_abc
label_desc: Use image node_id 2 for calling a global function with example usage: _get_ops_in_metagraph(meta_graph_def) and returns: set