class_docstr: GrapplerItem.
code: def metagraph(self):
      return self._metagraph
  
file_path: tensorflow/tensorflow/python/grappler/item.py
imports: from tensorflow.core.grappler.costs import op_performance_data_pb2
  from tensorflow.core.protobuf import meta_graph_pb2
  from tensorflow.python.grappler import _pywrap_tf_item
label_desc: Use image node_id 5 for calling the Item obj's underlying member method code with example usage: obj.metagraph() and returns: self