解决Lombok使用@Builder无法build父类属性的问题

package com.baijia.uqun.individual.management.facade;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Setter
@Getter
@NoArgsConstructor
@AllArgsConstructor
public class Father {
    
    public String fatherName;
}

package com.baijia.uqun.individual.management.facade;
import lombok.Builder;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;

@Setter
@Getter
@NoArgsConstructor
public class Child extends Father {
    
    private String childName;
    
    @Builder(toBuilder = true)
    public Child(String fatherName, String childName) {
        super(fatherName);
        this.childName = childName;
    }
}

package com.baijia.uqun.individual.management.facade;

public class Test {
    public static void main(String[] args) {
        // 创建一个子类
        Child child = Child.builder()
                .fatherName("父类名称")
                .childName("子类名称")
                .build();
        System.out.println(String.fORMat("父类名称：%s,子类名称：%s", child.getFatherName(), child.getChildName()));
    }
}

import lombok.*;

@Getter
@Setter
@ToString
@NoArgsConstructor
@AllArgsConstructor
@Builder
public class User {
    private Long id;
    private String name;
}

import lombok.*;

@Getter
@Setter
@Builder
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class UserExt extends User{
    private String address;
    private Integer age;
}

// 父类
User user = User.builder().id(1L).name("saint").build();
// 子类
UserExt userExt = UserExt.builder().address("南京").age(18).build();

public class UserExt extends User {
    private String address;
    private Integer age;
    public static UserExt.UserExtBuilder builder() {
        return new UserExt.UserExtBuilder();
    }
    public String getAddress() {
        return this.address;
    }
    public Integer getAge() {
        return this.age;
    }
    public void setAddress(final String address) {
        this.address = address;
    }
    public void setAge(final Integer age) {
        this.age = age;
    }
    public UserExt() {
    }
    public UserExt(final String address, final Integer age) {
        this.address = address;
        this.age = age;
    }
    public String toString() {
        return "UserExt(address=" + this.getAddress() + ", age=" + this.getAge() + ")";
    }
    public static class UserExtBuilder {
        private String address;
        private Integer age;
        UserExtBuilder() {
        }
        public UserExt.UserExtBuilder address(final String address) {
            this.address = address;
            return this;
        }
        public UserExt.UserExtBuilder age(final Integer age) {
            this.age = age;
            return this;
        }
        public UserExt build() {
            return new UserExt(this.address, this.age);
        }
        public String toString() {
            return "UserExt.UserExtBuilder(address=" + this.address + ", age=" + this.age + ")";
        }
    }
}

public abstract static class UserBuilder<C extends User, B extends User.UserBuilder<C, B>>
public abstract static class UserExtBuilder<C extends UserExt, B extends UserExt.UserExtBuilder<C, B>> extends UserBuilder<C, B>