luaobject.go
func (lo *LuaObject) Get(a interface{}, subfields ...interface{}) error {
	lo.Push()
	defer lo.l.Pop(1)
	err := get(lo.l, subfields...)
	if err != nil {
		return err
	}
	defer lo.l.Pop(1)
	return LuaToGo(lo.l, -1, a)
}
func (lo *LuaObject) Get(a interface{}, subfields ...interface{}) error {
	lo.Push()
	defer lo.l.Pop(1)
	err := get(lo.l, subfields...)
	if err != nil {
		return err
	}
	defer lo.l.Pop(1)
	return LuaToGo(lo.l, -1, a)
}
// Get stores in 'a' the Lua value indexed at the sequence of 'subfields'.
// 'a' must be a pointer as in LuaToGo.