code: def test_where_closest_to_regions():
      boston = geodata.geocode_cities("boston")
      worcester = geodata.geocode_cities("worcester").where(
          "worcester", closest_to=boston
      )
  
      assert_row(
          worcester.get_geocodes(),
          names="worcester",
          found_name="Worcester",
          id="158851900",
      )
      assert_row(
          worcester.get_centroids(),
          lon=-71.8154652712922,
          lat=42.2678737342358,
      )
  
imports: import pytest
  from shapely.geometry import Point, box
  import lets_plot.geo_data
  from lets_plot.geo_data import DF_COLUMN_FOUND_NAME, DF_COLUMN_ID, DF_COLUMN_COUNTRY, DF_COLUMN_STATE, DF_COLUMN_COUNTY, DF_COLUMN_CENTROID, DF_COLUMN_POSITION, DF_COLUMN_LIMIT
  from geo_data_test_util import assert_row, assert_error, NO_COLUMN, COLUMN_NAME_CITY
  from test_integration_with_geocoding_serever import TURN_OFF_INTERACTION_TEST
label_desc: Use image node_id 12 for calling a global function with example usage: test_where_closest_to_regions() without return types