dragDrop property
The draggable-points module allows points to be moved around or modified in
the chart. In addition to the options mentioned under the dragDrop API
structure, the module fires three events,
point.dragStart,
point.drag and
point.drop.
API Docs: https://api.highcharts.com/highcharts/series.streamgraph.dragDrop
Implementation
HighchartsSeriesDragDropOptions? dragDrop;