code: def forward(self, input):
      return (input * self.weight0).sum()
  
file_path: apex/tests/L0/run_amp/test_larc.py
imports: import unittest
  import torch
  from torch import nn
  from torch.nn import Parameter
  from apex import amp
  from apex.parallel.LARC import LARC
  from utils import common_init
label_desc: Use image node_id 2 for calling the MyModel obj's underlying member method code with example usage: obj.forward(input) and returns: unknown