dispose method
void
dispose()
Implementation
void dispose() {
// Call dispose on instance if it implements Disposable
if (instance is SpotDisposable) {
try {
(instance as SpotDisposable).dispose();
} catch (e) {
// Log error but continue with disposal
Spot.log.e('Error disposing $T', e);
}
}
instance = null;
_initializationFuture = null;
}