code: def forward(self, x, mask):
      return super().forward(x)
  
imports: import pytest
  import torch
  import deepspeed
  from deepspeed.accelerator import get_accelerator
  from copy import deepcopy
  from unit.common import DistributedTest
label_desc: Use image node_id 1 for calling the DropMaskLinear obj's underlying member method code with example usage: obj.forward(x, mask) and returns: super