openlayers判断当前几何图形

openlayers在绘画结束后，打印出几何图形的类型，判断当前几何图形是否为点。

this.lineDraw.on("drawend", function (event) {
    console.log(event.feature.getGeometry().getType());
    if (event.feature.getGeometry().getType() !== "Point") {
        ...
    }
})
this.map.addInteraction(this.lineDraw);