src/vs/platform/userDataSync/common/userDataSyncServiceIpc.ts/UserDataSyncChannel/getManualSyncTask
class UserDataSyncChannel:	private getManualSyncTask(manualSyncTaskId: string): IUserDataManualSyncTask {
		const manualSyncTask = this.manualSyncTasks.get(this.createKey(manualSyncTaskId));
		if (!manualSyncTask) {
			throw new Error(`Manual sync taks not found: ${manualSyncTaskId}`);
		}
		return manualSyncTask;
	}