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OCP (Open-Closed Principle) principle emphasizes that a software entity (class, function, module, etc.) should be open to extension and closed to modification. That is, every time there is a change, the behavior of the existing type should be enhanced by adding new code instead of modifying the original code.At this time, returning to "Other Power Settings", you can see that there is an additional "Excellent Performance" mode in the options.Mediator pattern defines a mediation object to encapsulate the interaction between a series of objects. Intermediaries do not need to explicitly refer to each other between objects, thus reducing coupling and independently changing their interaction behavior. The specific structure diagram is as follows:4. The request action in the Context and the encapsulated behavior in the state class can easily change independently without affecting each other.ABC已续订《神盾局特工》第四季。好男儿当如是。要知道一年前，陈文羽还想着自己辛苦一点，攒上个十几万，等陈启结婚时候，帮陈启付一个房子首付。