code: def rename_nodes(self, node, node_id):
      node_name = "node" + node_id
      return node_name
  
imports: from mmdnn.conversion.common.DataStructure.graph import GraphNode, Graph
  import torch
  import torch.autograd
  import torch.serialization
  import contextlib
  from torch.jit import _unique_state_dict
label_desc: Use image node_id 3 for calling the PytorchGraph151 obj's underlying member method code with example usage: obj.rename_nodes(node, node_id) and returns: node_name