code: public <T> Cursor<T> getCursor(String query, Class<T> entityClass, Object... params) throws NoSuchFieldException, SQLException {
          return getCursor(query, entityClass, 20, params);
      }
docs: Creates cursor, which can be used for fetching data in partial mode.
  
  @param <T>         Entity type.
  @param query       SQL query string.
  @param entityClass Entity class.
  @param params      Parameters, which will be placed instead of '?' signs.
  @return Single result entity or null.
  @throws SQLException         In general SQL error case.
  @throws NoSuchFieldException If result set has field which entity class doesn't.