src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts/BackLayerWebView/_createInset
class BackLayerWebView:	private _createInset(webviewService: IWebviewService, content: string) {
		this.localResourceRootsCache = this._getResourceRootsCache();
		const webview = webviewService.createWebviewElement({
			origin: BackLayerWebView.getOriginStore(this.storageService).getOrigin(this.notebookViewType, undefined),
			options: {
				purpose: WebviewContentPurpose.NotebookRenderer,
				enableFindWidget: false,
				transformCssVariables: transformWebviewThemeVars,
			},
			contentOptions: {
				allowMultipleAPIAcquire: true,
				allowScripts: true,
				localResourceRoots: this.localResourceRootsCache,
			},
			extension: undefined
		});

		webview.html = content;
		return webview;
	}