code: def forward(self, x):
      with torch.cuda.amp.autocast(self.fp16):
          for func in self.layers:
              x = func(x)
      x = self.conv_sep(x.float() if self.fp16 else x)
      x = self.features(x)
      return x
  
imports: import torch.nn
  from torch.nn import Linear, Conv2d, BatchNorm1d, BatchNorm2d, PReLU, Sequential, Module
  import torch
label_desc: Use image node_id 3 for calling the MobileFaceNet obj's underlying member method code with example usage: obj.forward(x) and returns: x