code: def forward(self, x):
      y = torch.add(x, x)
      z = torch.add(y, x)
      return z
  
imports: import torch
  import torch.fx
  from torch.fx.passes.infra.pass_base import PassBase, PassResult
  from torch.fx.passes.infra.pass_manager import _topological_sort_passes, pass_result_wrapper, PassManager, this_before_that_pass_constraint
  from torch.testing._internal.common_utils import TestCase
label_desc: Use image node_id 1 for calling the AddModule obj's underlying member method code with example usage: obj.forward(x) and returns: z