multiple demo data through an array field in the JSON file and then be chosen in the menu list

[ShixiangWang]

这个在生成器中没有实现

[ShixiangWang]

https://github.com/hiplot/scripts-basic/blob/master/r/heatmap/data.json

 {
      "config": {
        "general": {
          "palette": "nejm",
          "palette2": "aaas"
        },
        "extra": {
          "color": "default"
        }
      }
    },
    {
      "config": {
        "general": {
          "palette": "nejm",
          "palette2": "aaas"
        },
        "extra": {
          "color": "bluered"
        }
      }
    },
    {
      "config": {
        "general": {
          "palette": "nejm",
          "palette2": "aaas"
        },
        "extra": {
          "color": "methylation"
        }
      }
    }