code: def Norm2d(in_channels):
      """
      Custom Norm Function to allow flexible switching
      """
      layer = cfg.MODEL.BNFUNC
      normalizationLayer = layer(in_channels)
      return normalizationLayer
  
label_desc: Use image node_id 1 for calling a global function with example usage: Norm2d(in_channels) and returns: normalizationLayer