code: def get(identifier):
      if identifier not in layers:
          raise ValueError(
              "Unknown identifier {}. Available: {}".format(
                  identifier, list(layers.keys())
              )
          )
      else:
          return layers[identifier]
  
imports: import tensorflow
  from tensorflow.keras import backend
  from tensorflow.keras import constraints, initializers, regularizers
  from tensorflow.keras.layers import Dense, Layer
  from spektral.layers import ops
label_desc: Use image node_id 1 for calling a global function with example usage: get(identifier) and returns: layers