src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts/BackLayerWebView/_getResourceRootsCache
class BackLayerWebView:	private _getResourceRootsCache(): URI[] {
		const workspaceFolders = this.contextService.getWorkspace().folders.map(x => x.uri);
		const notebookDir = this.getNotebookBaseUri();
		return [
			this.notebookService.getNotebookProviderResourceRoots(),
			this.notebookService.getRenderers().map(x => dirname(x.entrypoint.path)),
			Array.from(this.notebookService.getStaticPreloads(this.notebookViewType), x => dirname(x.entrypoint)),
			workspaceFolders,
			notebookDir,
			this.getBuiltinLocalResourceRoots()
		].flat();
	}