anchor.diff:      LatLon? origin,
       LatLon? location,
       int? radius,
  +    String? region,
       String? language,
       String? types,
       List<Component>? components,
  
positive.code:     LatLon? origin,
      LatLon? location,
      int? radius,
      String? language,
      String? types,
      List<Component>? components,
  
negative.code:       queryParameters.addAll(item);
      }
  
      if (region != null && region != '') {
        var item = {
          'region': region,
        };
        queryParameters.addAll(item);
      }
  
      if (language != null && language != '') {
        var item = {
          'language': language,
  