code: function destroy() {
  			// Destroy the tracker group element
  			if (chart.trackerGroup) {
  				chart.trackerGroup = trackerGroup = chart.trackerGroup.destroy();
  			}
  
  			removeEvent(doc, 'mousemove', hideTooltipOnMouseMove);
  			container.onclick = container.onmousedown = container.onmousemove = container.ontouchstart = container.ontouchend = container.ontouchmove = null;
  		}
docs: Destroys the MouseTracker object and disconnects DOM events.