 },
              "baseline": { "value": "middle" },
              "fill": { "value": "#000" },
              "text": { "field": "name" },
              "fontSize": { "scale": "size", "field": "depth" },
              "fillOpacity": { "scale": "opacity", "field": "depth" }
            },
            "update": {
              "x": { "signal": "0.5 * (datum.x0 + datum.x1)" },
              "y": { "signal": "0.5 * (datum.y0 + datum.y1)" }
            }
          }
        }
      ]
    }






  </script>

  <