protostuffer的tag标签怎么嵌套对象序列化

import io.protostuff.Tag;

/**

• Created by zhangzh on 2017/2/20.
  */
  
  public class Student {

  @Tag(1)
  
  private String name;
  
  @Tag(2)
  
  private String studentNo;
  
  @Tag(3)
  
  private int age;
  
  @Tag(4)
  
  private String schoolName;

  各位大佬像这样的注解序列化方式要怎么嵌套别的对象进来序列化