code: def _convert_identity_operation(self, source_node, new_op=None):
      IR_node = self.IR_graph.node.add()
  
      # name, op
      self._copy_and_reop(source_node, IR_node, new_op)
  
      # input edge
      self.convert_inedge(source_node, IR_node)
  
      # output shape
      self.set_output_shape(source_node, IR_node)
  
      return IR_node
  
imports: import os
  import sys
  import math
  import mxnet
  import numpy
  from mmdnn.conversion.mxnet.mxnet_graph import MXNetGraph
  import mmdnn.conversion.common.IR.graph_pb2
  from mmdnn.conversion.common.IR.graph_pb2 import NodeDef, GraphDef, DataType
  from mmdnn.conversion.common.DataStructure.parser import Parser
  from mmdnn.conversion.common.utils import *
label_desc: Use image node_id 14 for calling the MXNetParser obj's underlying member method code with example usage: obj._convert_identity_operation(source_node, new_op) and returns: IR_node