class WorkManagerImpl extends WorkManager implements SynchronousWorkManager {

    @Override
    public void cancelAllWorkByTag(@NonNull final String tag) {
        mTaskExecutor.executeOnBackgroundThread(
                CancelWorkRunnable.forTag(tag, this));
    }

    @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);

}