code: def forward(self, x):
      x = self.linear1(x)
      x = self.linear2(x)
      return x
  
file_path: serve/test/pytest/test_onnx.py
imports: import subprocess
  import torch
  import torch.onnx
label_desc: Use image node_id 2 for calling the ToyModel obj's underlying member method code with example usage: obj.forward(x) and returns: x