code: public static GeoDistanceSortField geoDistance(String field, double latitude, double longitude) {
          return new GeoDistanceSortField(field, latitude, longitude);
      }
docs: Returns a new {@link GeoDistanceSortField} for the specified field.
  
  @param field the name of the geo point field mapper to be used for sorting
  @param latitude the latitude in degrees of the point to min distance sort by
  @param longitude the longitude in degrees of the point to min distance sort by
  @return a new geo distance sort field