code: def forward(self, x):
      return self.conv1(x)
  
imports: import sys
  import os
  import math
  import uuid
  import shutil
  import numpy
  import torch
  import torch.nn
  import torch.nn.functional
  from tensorboard.compat.proto.graph_pb2 import GraphDef
  from google.protobuf import text_format
  import unittest
  from unittest import TestCase, main
  from nni.common.graph_utils import build_module_graph, build_graph, TorchModuleGraph, TUPLE_UNPACK_KIND
label_desc: Use image node_id 2 for calling the BackboneModel1 obj's underlying member method code with example usage: obj.forward(x) and returns: self