start method
Lancia l'isolate
Implementation
Future<Validation> start() {
return _iHelper.listen()
.timeout(_timeout)
.catchError((e) {
if (e is Exception)
{
return e.toInvalid();
}
else if (e is Error)
{
return e.toInvalid();
}
return Error().toInvalid();
})
.then((result) async {
await _iHelper.kill();
return result;
});
}