leaved a puzzle for remaining null
@@ -243,6 +243,9 @@ public final class FkHitRefresh implements Fork {
/**
* Directory contents updated?
* @return TRUE if contents were updated
+ * @todo #744:30min `null` constant usage in the function
+ * `directoryUpdated` is violating the key principles, defined
+ * in README.md file and must be eliminated.
*/
private boolean directoryUpdated() {
this.lock.readLock().lock();
