docs: @Deprecated
      public GeographyPointValue add(GeographyPointValue offset, double alpha) {
          // The addition of 0.0 converts
          // -0.0 to 0.0.
          return GeographyPointValue.normalizeLngLat(getLongitude() + alpha * offset.getLongitude() + 0.0,
                                                     getLatitude()  + alpha * offset.getLatitude() + 0.0);
      }