下推方法

open in web edition

如何访问网络版？

refactorgram

class Employee {
  get quota {...}
}

class Engineer extends Employee {...}
class Salesman extends Employee {...}

image/svg+xml 

class Employee {...}
class Engineer extends Employee {...}
class Salesman extends Employee {
  get quota {...}  
}

的逆向操作是 上拉方法