src/vs/workbench/contrib/notebook/browser/contrib/marker/markerProvider.ts/MarkerListProvider/getMarkerList
class MarkerListProvider:	getMarkerList(resource: URI | undefined): MarkerList | undefined {
		if (!resource) {
			return undefined;
		}
		const data = CellUri.parse(resource);
		if (!data) {
			return undefined;
		}
		return new MarkerList(uri => {
			const otherData = CellUri.parse(uri);
			return otherData?.notebook.toString() === data.notebook.toString();
		}, this._markerService, this._configService);
	}