code: def forward(self, input):
      return (input - self.mean) * self.invstddev
  
imports: import json
  import math
  from collections import namedtuple
  from typing import List, Tuple
  import sentencepiece
  import torch
  import torchaudio
  from torchaudio.models import Hypothesis
label_desc: Use image node_id 2 for calling the GlobalStatsNormalization obj's underlying member method code with example usage: obj.forward(input) and returns: unknown