code: def test_attri2vec_save_load(tmpdir):
      attri2vec = Attri2Vec(
          layer_sizes=[4],
          bias=True,
          input_dim=2,
          node_num=4,
          multiplicity=2,
          activation="linear",
          normalize=None,
      )
      test_utils.model_save_load(tmpdir, attri2vec)
  
file_path: stellargraph/tests/layer/test_attri2vec.py
imports: from stellargraph.core.graph import StellarGraph
  from stellargraph.mapper import Attri2VecNodeGenerator
  from stellargraph.layer.attri2vec import *
  from tensorflow import keras
  import numpy
  import networkx
  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_attri2vec_save_load(tmpdir) without return types