code: def test_feature_storage_wholegraph_backend():
      from pylibwholegraph.utils.multiprocess import multiprocess_run
  
      gpu_count = wmb.fork_get_gpu_count()
      print("gpu count:", gpu_count)
      assert gpu_count > 0
  
      multiprocess_run(1, runtest)
  
imports: import pytest
  import numpy
  from cugraph.gnn import FeatureStore
  from cugraph.utilities.utils import import_optional, MissingModule
label_desc: Use image node_id 2 for calling a global function with example usage: test_feature_storage_wholegraph_backend() without return types