code: def normalization(channels, act=""):
      """
      Make a standard normalization layer.
  
      :param channels: number of input channels.
      :return: an nn.Module for normalization.
      """
      return GroupNorm(32, channels, act=act)
  
imports: import math
  import torch
  import torch.nn
  import torch.nn.functional
  from apex.contrib.group_norm import GroupNorm
label_desc: Use image node_id 8 for calling a global function with example usage: normalization(channels, act) and returns: GroupNorm