code: def forward(self, x, y):
      return self.op(x, y)
  
file_path: hls4ml/test/pytest/test_merge_pytorch.py
imports: from pathlib import Path
  import numpy
  import pytest
  import torch
  import torch.nn
  import hls4ml
label_desc: Use image node_id 2 for calling the MergeModule obj's underlying member method code with example usage: obj.forward(x, y) and returns: self