mouseOver property
Fires when the mouse enters the area close to the point. One
parameter, event
, is passed to the function, containing common
event information.
Returning false
cancels the default behavior, which is to show a
tooltip for the point.
API Docs: https://api.highcharts.com/highcharts/series.treegraph.data.events.mouseOver
Implementation
HighchartsCallback? mouseOver;