src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts/BackLayerWebView/resolveOutputId
class BackLayerWebView:	private resolveOutputId(id: string): { cellInfo: T, output: ICellOutputViewModel } | undefined {
		const output = this.reversedInsetMapping.get(id);
		if (!output) {
			return;
		}

		const cellInfo = this.insetMapping.get(output)!.cellInfo;
		return { cellInfo, output };
	}