code: def object_identifier(self):
      return constants.NETWORK_IDENTIFIER
  
imports: from tensorflow.python.keras.saving.saved_model import constants
  from tensorflow.python.keras.saving.saved_model import model_serialization
label_desc: Use image node_id 1 for calling the NetworkSavedModelSaver obj's underlying member method code with example usage: obj.object_identifier() and returns: constants