func luaReturnSingleFieldTable(l *lua.State, filed string) int {
if l.GetTop() != 1 || l.Type(-1) != lua.LUA_TSTRING {
luaPushError(l, "wrong number or type of arguments")
return 1
}
l.NewTable()
l.PushString(filed)
l.PushValue(-3)
l.SetTable(-3)
return 1
}