code: def test_empty_request_centroid():
      orange_county = geodata.geocode_counties("orange county").scope(
          "north carolina"
      )
      r = geodata.geocode_cities().scope(orange_county)
      df = r.get_centroids()
      assert_request_and_found_name_are_equal(df)
  
imports: import pytest
  import shapely
  from shapely.geometry import Point
  import lets_plot.geo_data
  from lets_plot.geo_data import DF_COLUMN_FOUND_NAME
  from geo_data_test_util import run_intergration_tests, assert_row, assert_error, get_request_column_name, assert_request_and_found_name_are_equal
label_desc: Use image node_id 37 for calling a global function with example usage: test_empty_request_centroid() without return types