code: def test_proteins_load() -> None:
      _graph_kernels_load(
          PROTEINS(),
          n_graphs=1113,
          total_nodes=43471,
          max_nodes=620,  # graph 77
          total_edges=162088,
          expected_labels={"1", "2"},
          node_features=3 + 1,  # 3 labels, one attribute
          mean_nodes=39.06,
          mean_edges=72.82,
      )
  
imports: import pytest
  import tempfile
  import os
  import sys
  import numpy
  from stellargraph.datasets import *
  from urllib.error import URLError
  from stellargraph.datasets.dataset_loader import DatasetLoader
  from urllib.request import urlretrieve
  from unittest.mock import patch
label_desc: Use image node_id 9 for calling a global function with example usage: test_proteins_load() without return types