code: def ProcessGraphDefParam(graph_def):
      """Type-checks and possibly canonicalizes `graph_def`.
  
      Parameters
      ----------
      graph_def : Obj
          tensorflow graph definition.
  
      Returns
      -------
      graph_def : Obj
          tensorflow graph definition
  
      """
  
      if not isinstance(graph_def, graph_pb2.GraphDef):
          # `graph_def` could be a dynamically-created message, so try a duck-typed
          # approach
          try:
              old_graph_def = graph_def
              graph_def = graph_pb2.GraphDef()
              graph_def.MergeFrom(old_graph_def)
          except TypeError:
              raise TypeError("graph_def must be a GraphDef proto.")
      return graph_def
  
imports: import re
  import os.path
  import collections
  import numpy
  import tensorflow
  from tensorflow.core.framework import graph_pb2
  import tvm
  from tvm.contrib.download import download_testdata
label_desc: Use image node_id 1 for calling a global function with example usage: ProcessGraphDefParam(graph_def) and returns: graph_def