code: def setup_function():
      gc.collect()
  
imports: import gc
  import pytest
  import pandas
  import numpy
  import dask
  import cudf
  import dask_cudf
  import cugraph.dask
  import cugraph
  from cugraph.testing import utils
  from cugraph.structure.number_map import NumberMap
  from cugraph.dask.common.mg_utils import is_single_gpu
  from cugraph.testing.utils import RAPIDS_DATASET_ROOT_DIR_PATH
  from cudf.testing import assert_frame_equal, assert_series_equal
label_desc: Use image node_id 1 for calling a global function with example usage: setup_function() without return types