packer unsetting 封隔器解封
This destructor would have to be called specifically before unsetting the parent class reference.
这种解构器必须在解除父类引用之前进行调用。
The first step is to make sure that the user is logged out by unsetting the relevant session variables.
第一步，确保用户是通过取消相关会话变量来进行注销的。
We can test and unset individual instance properties of the contact. For example, if the user cleared the string in the interface, we could use this to signify unsetting.
我们可以测试和取消设置联系人的个别实例属性。
应用推荐