onResume method
inherited
Callback for resuming probe
Implementation
void onResume() {
super.onResume();
// create a recurrent timer that resumes sampling every [frequency].
timer = Timer.periodic(frequency, (Timer t) async {
try {
getDatum().then((Datum data) {
if (data != null) controller.add(data);
});
} catch (e, s) {
controller.addError(e, s);
}
});
}