Method definitions start with the def keyword.
方法定义由def关键字开始。
If that test fails, it delegates to the parent method using the parent keyword.
如果该测试失败，则它使用parent关键字指派给父方法。
Granted, that little keyword "true" in the open method sets up an asynchronous request.
必须承认，open方法中“true”这个小小的关键字建立了异步请求。
The methods keyword allows you to select method trace by class, method name, or both.
methods关键字允许按照类、方法名或这两者选择要跟踪的方法。
The magic here lies with the (keyword-like) def_interface method call.
此处的魔力在于(类似于关键字)def_interface方法调用。
No abstract keyword is required on the method.
在方法上不用写abstract(抽象)关键字。
Since the new click method overrides Button's concrete implementation, the override keyword is required.
因为新的click方法重写了Button的具体实现，必须加上override关键字。
Since the new click method overrides Button's concrete implementation, the override keyword is required.
因为新的click方法重写了Button的具体实现，必须加上override关键字。
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