[]用layaair如何加載蒙皮動畫，请问怎么加载.lm文件和.ani文件，有沒有實例可以看下

代碼如下：
this.scene = Laya.stage.addChild(new Laya.Scene());

//加载相机
this.camera = this.scene.addChild(new Laya.Camera());
this.scene.CurrentCamera = this.camera;

//男角色
this.roleMan = new Laya.MeshSprite3D(Laya.Mesh.load("3d/man/CunMinNan-cunminnan.lm"));
this.roleMan.transform.localScale = new Laya.Vector3(0.01, 0.01, 0.01);
this.roleMan.transform.localPostion = new Laya.Vertor3(0,-0.5,-3);
this.scene.addChild(this.roleMan);

//添加蒙皮动画组件
var anniRoleMan = this.roleMan.addComponent(Laya.SkinAnimations);
anniRoleMan.url = "3d/man/CunMinNan.ani";
anniRoleMan.play();
然后发现play函数报错，现在的layaair版本是1.7.19beta,请问怎么处理