code: def test_untrained_model_persistence(model_filepath):
      model = Ivis(k=15, batch_size=16, epochs=2)
      model.save_model(model_filepath)
  
imports: import os
  import tempfile
  import pytest
  import pickle
  import dill
  from functools import partial
  from sklearn import datasets
  import numpy
  import tensorflow
  from ivis import Ivis
label_desc: Use image node_id 13 for calling a global function with example usage: test_untrained_model_persistence(model_filepath) without return types