目录监听接口类 Listenable实际用法打印结果首先，会用到 函数式接口 Consumer, 通过这个可以解耦回调方法，下面先写一个抽象的监听接口
I want to turn auto-correction on/off based on the content in the text field. For example, if the user is typing a phrase like \"Machine tools\" I want auto-correction to be on (for the rest of the w
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