访问器方法涉及两种方法：setters和getters(有时分别称为mutators和accessors)。
Accessor methods come in two flavors: setters and getters (sometimes referred to as mutators and accessors, respectively).
访问器方法涉及两种方法：setters和getters(有时分别称为mutators和accessors)。
Accessor methods come in two flavors: setters and getters (sometimes referred to as mutators and accessors, respectively).
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