code: def test_node2vec_save_load(tmpdir):
      node2vec = Node2Vec(emb_size=4, node_num=4, multiplicity=2)
      test_utils.model_save_load(tmpdir, node2vec)
  
file_path: stellargraph/tests/layer/test_node2vec.py
imports: from stellargraph.core.graph import StellarGraph
  from stellargraph.mapper import Node2VecNodeGenerator
  from stellargraph.layer.node2vec import *
  from tensorflow import keras
  import numpy
  import pytest
  from ..test_utils.graphs import example_graph
  from ..None import test_utils
label_desc: Use image node_id 4 for calling a global function with example usage: test_node2vec_save_load(tmpdir) without return types