code: def forward(self, x):
      return torch.matmul(x, self.weight)
  
file_path: opacus/opacus/tests/utils.py
imports: import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the MatmulModule obj's underlying member method code with example usage: obj.forward(x) and returns: torch