anchor.diff:        queryParameters.addAll(item);
       }
   
  +    if (region != null && region != '') {
  +      var item = {
  +        'region': region,
  +      };
  +      queryParameters.addAll(item);
  +    }
  +
       if (language != null && language != '') {
         var item = {
           'language': language,
  
positive.code:   /// [radius] Optional parameters - The distance (in meters) within which to return place results.
    ///  Note that setting a radius biases results to the indicated area, but may not fully restrict
    /// results to the specified area. See Location Biasing and Location Restrict below.
    ///
    /// [language] Optional parameters -  The language code, indicating in which language the results
    ///  should be returned, if possible. Searches are also biased to the selected language; results
  
negative.code:     LatLon? origin,
      LatLon? location,
      int? radius,
      String? region,
      String? language,
      String? types,
      List<Component>? components,
  