code: def test_zero_pair():
      ls1 = cuspatial.GeoSeries([])
      ls2 = cuspatial.GeoSeries([])
  
      got = cuspatial.pairwise_linestring_distance(ls1, ls2)
      expected = cudf.Series([], dtype="float64")
  
      assert_eq(got, expected)
  
file_path: cuspatial/python/cuspatial/cuspatial/tests/spatial/distance/test_pairwise_linestring_distance.py
imports: from shapely.geometry import LineString
  import cudf
  from cudf.testing._utils import assert_eq
  import cuspatial
label_desc: Use image node_id 1 for calling a global function with example usage: test_zero_pair() without return types