code: def forward(self, x):
      x = self.linear_1(x)
      x = self.linear_2(x)
  
      return x
  
file_path: ColossalAI/tests/test_auto_parallel/test_tensor_shard/test_compatibility_with_gemini.py
imports: import copy
  import pytest
  import torch
  from colossalai.device.device_mesh import DeviceMesh
  from colossalai.initialize import launch
  from colossalai.logging import disable_existing_loggers
  from colossalai.nn.optimizer import HybridAdam
  from colossalai.testing import assert_close, rerun_if_address_is_in_use, run_on_environment_flag, spawn
  from colossalai.utils import get_current_device
  from colossalai.zero import zero_model_wrapper, zero_optim_wrapper
label_desc: Use image node_id 2 for calling the MLP obj's underlying member method code with example usage: obj.forward(x) and returns: x