code: def forward(self):
      input = torch.rand(1, 16, 2)
      tgt = torch.rand((1, 16, 2))
      r = self.transformers[0](input, tgt)
      r = self.transformers[1](input)
      r = self.transformers[2](input, tgt)
      return len(r)
  
imports: import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the NNTransformerModule obj's underlying member method code with example usage: obj.forward() and returns: len