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剧中讲述罗伯特是一位讲原则不伤无辜的杀手，他已经对杀手生涯感到厌倦。就在此时，一位心狠手辣的年轻杀手贝米高忽然出现，引起了罗伯特的注意。贝米高企图通过杀死罗伯特而取得第一杀手的位置。为此，他抢去了罗伯特的合约，并且和罗伯特展开了殊死的较量。One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code."Once upon a time, there lived a mother pig and its three piglets in a distant place. The mother pig was unable to feed the three piglets, so she asked the three piglets to go out and look for their own happiness."The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.一个女子神秘失踪7年，回来之后，却带回了不属于自身的记忆，可能是超自然现象。她表示自己并非失踪，而是一直都在。胖男人皱眉，问家仆道：只他一人，拐子呢？一个家仆摇头道：小的们进去的时候，就他跟这条狗在里面。伴随着童年的歌谣，乐满瑶和鲁小牛在天蓝海阔的渔米水乡一起成长。满瑶有着天籁般的嗓音，梦想能够站在舞台上尽情歌唱。但是小牛的一次恶作剧误伤了满瑶，从此她变成了一个轻微口吃的女孩。不久，小牛家发生变故，随母亲定居上海。