"type": "string",
"description": "When to display the legend. By default, it only appears when a user mouses over the chart. Set it to \"always\" to always display a legend of some sort. When set to \"follow\", legend follows highlighted points."
},
"type": "string",
"description": "When to display the legend. By default, it only appears when a user mouses over the chart. Set it to \"always\" to always display a legend of some sort. When set to \"follow\", legend follows highlighted points."
},