onStop property
        
        dynamic
        onStop
        
      
getter/setter pair
      Called on pause, cancel, or if play is completed.
A context object is passed to the function, with properties chart,
timeline and pointsPlayed. pointsPlayed is an array of Point
objects, referencing data points that were related to the audio
events played.
API Docs: https://api.highcharts.com/highcharts/sonification.events.onStop
Implementation
dynamic onStop;