class SyncController {

  public boolean isSyncActive() {
    return currentSync.map(InProgressSync::isActive).orElse(false);
  }

  public  SyncController(
      final EventThread eventThread,
      final Executor subscriberExecutor,
      final RecentChainData recentChainData,
      final ChainSelector finalizedTargetChainSelector,
      final ChainSelector nonfinalizedTargetChainSelector,
      final Sync sync);

}