start method
void
start()
Implementation
void start() {
Workmanager().registerPeriodicTask(
"sync-task-identifier",
"sync-task",
initialDelay: const Duration(minutes: 30),
frequency: const Duration(hours: 3),
existingWorkPolicy: ExistingWorkPolicy.keep,
constraints: Constraints(
networkType: NetworkType.connected,
),
);
}