aspectj的declare parents 含义或者作用是什么

Question

aspectj的declare parents 含义或者作用是什么

//TaintedObject为接口
public interface TaintedObject {
    boolean isTainted();
    void setTainted(boolean tainted);
 }

//抽象类AbstractTaintedObjectAspect 实现了TaintedObject接口
public abstract aspect AbstractTaintedObjectAspect implements TaintedObject {

    public final boolean TaintedObject.isTainted() {
        return tainted;
    }
    
    public final void TaintedObject.setTainted(boolean tainted) {
        this.tainted = tainted;
    }
}

//继承了抽象类
public aspect TaintedObjectAspect extends AbstractTaintedObjectAspect {

    declare parents: java.lang.String implements TaintedObject;
    declare parents: java.lang.StringBuffer implements TaintedObject;
    declare parents: java.lang.StringBuilder implements TaintedObject;

}

为什么String类可以直接使用抽象类中实现的方法，declare parents在这里的作用是什么