code: def forward(self, x):
      return self.fc2(self.relu(self.fc1(x)))
  
file_path: fairscale/tests/nn/data_parallel/test_fsdp_fwd_fwd_bwd_bwd.py
imports: import torch
  import torch.nn
  from fairscale.fair_dev.testing.testing import skip_if_single_gpu, temp_files_ctx
  from fairscale.nn import enable_wrap, wrap
  from fairscale.nn.data_parallel import FullyShardedDataParallel
label_desc: Use image node_id 2 for calling the FFN obj's underlying member method code with example usage: obj.forward(x) and returns: self