docs: public <T> T page(Connection conn, Collection<String> fields, Entity where, Page page, RsHandler<T> rsh) throws SQLException {
  		checkConn(conn);
  		if(null == page){
  			return this.find(conn, fields, where, rsh);
  		}
  		
  		final Query query = new Query(SqlUtil.buildConditions(where), where.getTableName());
  		query.setFields(fields);
  		query.setPage(page);
  		return SqlExecutor.queryAndClosePs(dialect.psForPage(conn, query), rsh);
  	}