src/vs/workbench/contrib/notebook/common/services/notebookWorkerServiceImpl.ts/NotebookWorkerClient/_withSyncedResources
class NotebookWorkerClient:	protected _withSyncedResources(resources: URI[]): Promise<NotebookEditorSimpleWorker> {
		return this._getProxy().then((proxy) => {
			this._getOrCreateModelManager(proxy).ensureSyncedResources(resources);
			return proxy;
		});
	}