public static Page <TRet> Page <T1, T2, TRet>(this Database db, Func <T1, T2, TRet> cb, int page, long itemsPerPage, string sql, params object[] args)
{
string sqlCount, sqlPage;
db.BuildPageQueries <TRet>((page - 1) * itemsPerPage, itemsPerPage, sql, ref args, out sqlCount, out sqlPage);
return(db.PageByCb <T1, T2, TRet>(cb, page, itemsPerPage, sqlCount, args, sqlPage, args));
}