3D 1.0.4 不支持嵌套引用ccclass了吗？

Creator 3.x
#1 
import { _decorator, Component } from "cc";
const { ccclass, property } = _decorator;

@ccclass
export class AAA extends Component {
    @property
    a: string = 'aaaaa';

}

@ccclass
export class BBB extends Component {
    @property
    b: number = 1.0;
}

@ccclass
export default class TestAbc extends Component {
    @property(AAA)
    aaa: AAA = new AAA;

    @property(BBB)
    bbb: BBB = new BBB;
}

2.x支持的这种引用方式，在3D的1.0.4版本里，引用显示不全：

#2

一个脚本文件中只能有一个组件

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