code: function destroy() {
  			each(crosshairs, function (crosshair) {
  				if (crosshair) {
  					crosshair.destroy();
  				}
  			});
  
  			// Destroy and clear local variables
  			each([box, label, group], function (obj) {
  				if (obj) {
  					obj.destroy();
  				}
  			});
  			box = label = group = null;
  		}
docs: Destroy the tooltip and its elements.