squid:S2325 - private methods that don't access instance data should be static

facade/src/main/java/com/iluwatar/facade/DwarvenGoldmineFacade.java

@@ -60,7 +60,7 @@ public class DwarvenGoldmineFacade {
     makeActions(workers, DwarvenMineWorker.Action.GO_HOME, DwarvenMineWorker.Action.GO_TO_SLEEP);
   }
 
-  private void makeActions(Collection<DwarvenMineWorker> workers,
+  private static void makeActions(Collection<DwarvenMineWorker> workers,
       DwarvenMineWorker.Action... actions) {
     for (DwarvenMineWorker worker : workers) {
       worker.action(actions);