A signature can embed a token that identifies the enclosingclass or value type.
签名中可以嵌入标识封闭类或值类型的标记。
2
To preserve this functionality, the refactoring will add an instance of the enclosingclass BagExample to the formerly nested class.
为了保留这种功能，重构过程将一个装入类 BagExample 的实例放在前面那个嵌套类中。
3
The first set of enclosing braces delineates the construction of an anonymous inner class, and the second set delineates the instance initializer for the anonymous inner class.