Added some stuff

Author: RealMangorage

core-api/src/main/java/dev/compactmods/machines/api/event/IEventListenerList.java

@@ -9,5 +9,11 @@
  */
 public interface IEventListenerList<B> {
     void addListener(B listener);
+
+    default <E extends B> void addListener(Class<E> eClass, E listener) {
+        addListener(listener);
+    }
+
     Stream<B> getListeners();
+
 }

neoforge-main/src/main/java/dev/compactmods/machines/room/upgrade/example/TreeCutterUpgrade.java

@@ -50,8 +50,7 @@ public void addToTooltip(@NotNull Item.TooltipContext ctx, Consumer<Component> t
 
     @Override
     public void gatherEvents(IEventListenerList<RoomUpgradeEvent> listenerList) {
-        final UpgradeTickedEventListener ticker = TreeCutterUpgrade::onTick;
-        listenerList.addListener(ticker);
+        listenerList.addListener(UpgradeTickedEventListener.class, TreeCutterUpgrade::onTick);
     }
 
     @Override