class_docstr: GrapplerItem.
code: def IdentifyImportantOps(self, sort_topologically=False):
      return tf_item.TF_IdentifyImportantOps(
          self.tf_item, sort_topologically
      )
  
file_path: tensorflow-upstream/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 2 for calling the Item obj's underlying member method code with example usage: obj.IdentifyImportantOps(sort_topologically) and returns: tf_item