code: def rename_Activation(self, source_node):
      self._convert_identity_operation(
          source_node,
          new_op=MXNetParser.activation_map[
              source_node.get_attr("act_type")
          ],
      )
  
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 21 for calling the MXNetParser obj's underlying member method code with example usage: obj.rename_Activation(source_node) without return types