code: public MultiPolygon toMultiPolygon(
              List<com.google.android.gms.maps.model.Polygon> polygonList) {
          return toMultiPolygon(polygonList, false, false);
      }
docs: Convert a list of {@link com.google.android.gms.maps.model.Polygon} to a
  {@link MultiPolygon}
  
  @param polygonList polygon list
  @return multi polygon