code: def forward(self, x):
      return self.seq(x)
  
file_path: baal/tests/ensemble_test.py
imports: import pytest
  import torch
  from torch import nn
  from torch import optim
  from torch.utils.data import Dataset
  from baal.ensemble import EnsembleModelWrapper, ensemble_prediction
label_desc: Use image node_id 2 for calling the AModel obj's underlying member method code with example usage: obj.forward(x) and returns: self