code: def layernorm(w_in):
      """Helper for building a layernorm layer."""
      return nn.LayerNorm(w_in, eps=cfg.LN.EPS)
  
imports: import numpy
  import torch
  import torch.nn
  from pycls.core.config import cfg
  from torch.nn import Module
label_desc: Use image node_id 6 for calling a global function with example usage: layernorm(w_in) and returns: nn