public GeocodingApiRequest region(String region) {
    return param("region", region);
  }
Sets the region code, specified as a ccTLD ("top-level domain") two-character value. This
parameter will only influence, not fully restrict, results from the geocoder.

<p>For more information see <a
href="https://developers.google.com/maps/documentation/geocoding/intro?hl=pl#RegionCodes">Region
Biasing</a>.

@param region The region code to influence results.
@return Returns this {@code GeocodingApiRequest} for call chaining.
src/main/java/com/google/maps/GeocodingApiRequest.java