class WorkManagerImpl extends WorkManager implements SynchronousWorkManager {

    @Override
    public LiveData<Long> getLastCancelAllTimeMillis() {
        return mPreferences.getLastCancelAllTimeMillisLiveData();
    }

    @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) public  WorkManagerImpl(
            @NonNull Context context,
            @NonNull Configuration configuration);
    @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) public  WorkManagerImpl(
            @NonNull Context context,
            @NonNull Configuration configuration,
            boolean useTestDatabase);

}