data property
An array of data points for the series. For the flowmap series
type, points can be given in the following ways:
- 
An array of arrays with options as values. In this case, the values correspond to from, to, weight. Example:
- 
An array of objects with named values. The following snippet shows only a few settings, see the complete options set below. 
- 
For objects with named values, instead of using the mappointid, you can use[longitude, latitude]arrays.
API Docs: https://api.highcharts.com/highcharts/series.flowmap.data
Implementation
List<List<dynamic>>? data;