选择模型并获取到该模型的属性需要怎么做 ？

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 var handler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);

        handler.setInputAction(function (movement) {

            var pick = viewer.scene.pick(movement.position);

            if (Cesium.defined(pick) && (pick.id.id === 'id')) {


            }

        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);