fetchInstallDay static method
Returns install day in UTC milliseconds since epoch, or -1 if error.
Implementation
static Future<void> fetchInstallDay() async {
try {
final int installDayMillis = await _channel.invokeMethod<int>('getInstallDay') ?? -1;
Event.setInstallDay(installDayMillis);
} catch (e) {
print("Failed to get App Install Day: $e");
}
}