code: def forward(self, x):
      return self.w2(F.silu(self.w1(x)) * self.w3(x))
  
file_path: mixtral-kit/mixtralkit/layers/ffn.py
imports: import torch
  import torch.nn.functional
  from torch import nn
  from typing import Optional, Tuple
label_desc: Use image node_id 2 for calling the FairScaleFFN obj's underlying member method code with example usage: obj.forward(x) and returns: self