//方法一：直接异步加载

            var layaMonkey:Sprite3D = scene.addChild(Sprite3D.load(url+"LayaScene_sharedunity/sharedunity.lh")) as Sprite3D;
            
            var zombieAnimator:Animator =layaMonkey.getChildAt(0).getComponentByType(Animator) as Animator;
            
                zombieAnimator.clip.islooping = true;
        
            zombieAnimator.stop();

错误提示：TypeError: Cannot read property 'getComponentByType' of undefined
看例程关于层级的不是很详细，自己也不是很理解这个关系，麻烦给看下是什么问题呢，谢谢。
以是LH文件内容：

{
    "type":"Sprite3D",
    "props":{
        "name":"sharedunity"
    },
    "customProps":{
        "translate":[
            0,
            0,
            0
        ],
        "rotation":[
            0,
            0,
            0,
            -1
        ],
        "scale":[
            1,
            1,
            1
        ]
    },
    "child":[
        {
            "type":"MeshSprite3D",
            "props":{
                "isStatic":false,
                "name":"share"
            },
            "customProps":{
                "layer":0,
                "translate":[
                    0,
                    0,
                    0
                ],
                "rotation":[
                    0.7071068,
                    0,
                    0,
                    -0.7071068
                ],
                "scale":[
                    1,
                    1,
                    1.5
                ],
                "meshPath":"Assets/share-Sphere001.lm",
                "materials":[
                    {
                        "type":"Laya.BlinnPhongMaterial",
                        "path":"Resources/unity_builtin_extra.lmat"
                    }
                ]
            },
            "components":{
                "Rigidbody":{},
                "Animator":{
                    "clipPaths":[
                        "Assets/shared-shared.lani"
                    ],
                    "playOnWake":true
                }
            },
            "child":
        },
        {
            "type":"Camera",
            "props":{
                "isStatic":false,
                "name":"Main Camera",
                "clearFlag":1,
                "orthographic":false,
                "fieldOfView":29,
                "nearPlane":0.1,
                "farPlane":100
            },
            "customProps":{
                "layer":0,
                "translate":[
                    -1.49,
                    1.58,
                    -6.84
                ],
                "rotation":[
                    0,
                    1,
                    0,
                    0
                ],
                "scale":[
                    1,
                    1,
                    1
                ],
                "viewport":[
                    0,
                    0,
                    1,
                    1
                ],
                "clearColor":[
                    1,
                    1,
                    1,
                    0
                ],
                "skyBox":{
                    "sharedMaterial":{}
                }
            },
            "components":{},
            "child":
        },
        {
            "type":"DirectionLight",
            "props":{
                "isStatic":false,
                "name":"Directional Light",
                "intensity":1,
                "lightmapBakedType":0
            },
            "customProps":{
                "layer":0,
                "translate":[
                    -1.17,
                    2.2,
                    -0.39
                ],
                "rotation":[
                    0.1093816,
                    0.8754261,
                    0.4082179,
                    -0.2345697
                ],
                "scale":[
                    1,
                    1,
                    1
                ],
                "color":[
                    1,
                    1,
                    1
                ]
            },
            "components":{},
            "child":
        }
    ]
}

附件：
moudong.zip

moudong.zip