code: def normalization(channels: int):
      """
      ### Group normalization
  
      This is a helper function, with fixed number of groups and `eps`.
      """
      return nn.GroupNorm(
          num_groups=32, num_channels=channels, eps=1e-6
      )
  
imports: from typing import List
  import torch
  import torch.nn.functional
  from torch import nn
label_desc: Use image node_id 2 for calling a global function with example usage: normalization(channels) and returns: nn