src/vs/editor/contrib/zoneWidget/browser/zoneWidget.ts/ZoneWidget/position
class ZoneWidget:	get position(): Position | undefined {
		const [id] = this._positionMarkerId;
		if (!id) {
			return undefined;
		}

		const model = this.editor.getModel();
		if (!model) {
			return undefined;
		}

		const range = model.getDecorationRange(id);
		if (!range) {
			return undefined;
		}
		return range.getStartPosition();
	}