Instantiate an object of that class.

实例化该类的一个对象。

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This is a class that can be used repeatedly to instantiate a class as a singleton without having to re-write the singleton pattern code for that specific class.

这是一个可用来创建单例类实例确不需要为每个特定的类重写单例模式代码的可重用的类。

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Step 3. Instantiate the class for the method's input type.

步骤3 .为方法的输入类型实例化类。

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