code: @Override
      public IDocumentQuery<T> withinRadiusOf(String fieldName, double radius, double latitude, double longitude) {
          return withinRadiusOf(fieldName, radius, latitude, longitude, null, Constants.Documents.Indexing.Spatial.DEFAULT_DISTANCE_ERROR_PCT);
      }
docs: TBD expr IDocumentQuery<T> IDocumentQueryBase<T, IDocumentQuery<T>>.WithinRadiusOf<TValue>(Expression<Func<T, TValue>> propertySelector, double radius, double latitude, double longitude, SpatialUnits? radiusUnits, double distanceErrorPct)