code: def forward(self, *args, **kwargs):
      global forward_calls
      forward_calls += 1
      return super().forward(*args, **kwargs)
  
imports: import torch
  import torch.nn
  import pytest
  from allennlp.common.params import Params
  from allennlp.common.testing import multi_device
  from allennlp.nn.checkpoint.checkpoint_wrapper import CheckpointWrapper, TorchCheckpointWrapper
label_desc: Use image node_id 1 for calling the LinearForTesting obj's underlying member method code with example usage: obj.forward() and returns: super