in www/accelerometer.js [212:225]
clearWatch: function (id) {
// Stop javascript timer & remove from timer list
if (id && timers[id]) {
window.clearInterval(timers[id].timer);
removeListeners(timers[id].listeners);
delete timers[id];
if (eventTimerId && Object.keys(timers).length === 0) {
// No more watchers, so stop firing 'devicemotion' events
window.clearInterval(eventTimerId);
eventTimerId = null;
}
}
}