code: def make_node_key(op, node_index):
      return str(id(op)) + "_ib-" + str(node_index)
  
imports: import collections
  import tree
  from keras.api_export import keras_export
  from keras.backend import KerasTensor
  from keras.backend.config import backend
  from keras.ops.operation import Operation
  from keras.utils.nest import pack_sequence_as
label_desc: Use image node_id 1 for calling a global function with example usage: make_node_key(op, node_index) and returns: unknown