code: def test_empty():
      result = cuspatial.point_in_polygon(
          cuspatial.GeoSeries([]), cuspatial.GeoSeries([])
      )
      cudf.testing.assert_frame_equal(result, cudf.DataFrame())
  
file_path: cuspatial/python/cuspatial/cuspatial/tests/spatial/join/test_point_in_polygon.py
imports: import numpy
  import cudf
  import cuspatial
  from cuspatial.core.spatial.join import pip_bitmap_column_to_binary_array
label_desc: Use image node_id 1 for calling a global function with example usage: test_empty() without return types