code: public static Class <? extends RowMapper> setDefaultRowMapping(Class<? extends RowMapper> rowMapperClass) {
          Class<? extends RowMapper> ret = DEFAULT_OBJ_ROWMAPPING;
          DEFAULT_OBJ_ROWMAPPING = rowMapperClass;
          return ret;
      }
docs: Sets the rowmapper for Object.class
  
  @param rowMapperClass