dataLabels property
Extended data labels for range series types. Range series data
labels use no x and y options. Instead, they have xLow,
xHigh, yLow and yHigh options to allow the higher and lower
data label sets individually.
API Docs: https://api.highcharts.com/highcharts/series.arearange.dataLabels
Implementation
HighchartsAreaRangeSeriesDataLabelsOptions? dataLabels;