有没有办法在绘图和X轴之间添加换行符(vega-lite)

{
  "data": {
    "values": [
      {"x": "Label 1"},
      {"x": "Label 2"},
      {"x": "Label 3"}
    ]
  },
  "mark": "bar",
  "encoding": {
    "x": {
      "field": "x",
      "type": "nominal",
      "axis": {
        "labelExpr": "datum.value.split(' ').join('\\n')"
      }
    },
    "y": {"field": "y", "type": "quantitative"}
  }
}