code: public GeocodingApiRequest bounds(LatLng southWestBound, LatLng northEastBound) {
      return param("bounds", join('|', southWestBound, northEastBound));
    }
docs: Sets the bounding box of the viewport within which to bias geocode results more prominently.
  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#Viewports">
  Viewport Biasing</a>.
  
  @param southWestBound The South West bound of the bounding box.
  @param northEastBound The North East bound of the bounding box.
  @return Returns this {@code GeocodingApiRequest} for call chaining.