src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts/BackLayerWebView/getBuiltinLocalResourceRoots
class BackLayerWebView:	private getBuiltinLocalResourceRoots(): URI[] {
		// Python notebooks assume that requirejs is a global.
		// For all other notebooks, they need to provide their own loader.
		if (!this.documentUri.path.toLowerCase().endsWith('.ipynb')) {
			return [];
		}

		if (isWeb) {
			return []; // script is inlined
		}

		return [
			dirname(FileAccess.asFileUri('vs/loader.js', require)),
		];
	}