class_docstr: GrapplerItem.
code: def tf_item(self):
      if self._item_graph != self._metagraph:
          self._BuildTFItem()
          self._item_graph.CopyFrom(self._metagraph)
      return self._tf_item
  
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 6 for calling the Item obj's underlying member method code with example usage: obj.tf_item() and returns: self