Care must be taken when using the ng_set method, as one might create inconsistency in some objects.
时,必须小心使用ng_set方法,可能会造成某些对象的不一致。
Its use is ng_set(object) to see what you can modify and ng_set(object,"what") <- .... See ng_set<–methods.
它的用途是ng_set(object)来看看有什么可以修改和ng_set(object,"what") <- ...。见ng_set<–methods。