In the (highstock) navigator.series documentation there is no data property mentioned (https://api.highcharts.com/highstock/navigator.series), however in your example (https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/stock/navigator/series-data/) you provide a data attribute.

I guess you covered it with the sentence in the introduction 'Available options are the same as any series'. But the problem is if it is not reflected in the documentation it is not available in TypeScript (because I think you generated the sources out of the documentation?)

Would be great if you can adjust the documentation (and TS type for NavigatorSeriesOptions)