mouseOver property
        
        dynamic
        mouseOver
        
      
getter/setter pair
      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.streamgraph.data.events.mouseOver
Implementation
dynamic mouseOver;