code: def forward(self, x, y):
      x = self.input_layer(x)
      for layer in self.layers:
          x = layer(x)
      x = self.output_layer(x)
      return x
  
imports: import os
  import json
  import argparse
  import torch
  from deepspeed.pipe import PipelineModule, LayerSpec
  from deepspeed.moe.layer import MoE
  import deepspeed.comm
label_desc: Use image node_id 2 for calling the LinearStack obj's underlying member method code with example usage: obj.forward(x, y) and returns: x