Rule for Serpulo core unloaders taking items from the core

core/src/mindustry/world/blocks/storage/CoreBlock.java

@@ -276,6 +276,11 @@ public class CoreBlock extends StorageBlock{
             commandPos = target;
         }
 
+        @Override
+        public boolean canUnload(){
+            return block.unloadable && state.rules.allowCoreUnloaders;
+        }
+
         @Override
         public void draw(){
             //draw thrusters when just landed

core/src/mindustry/world/blocks/storage/StorageBlock.java

@@ -53,6 +53,11 @@ public class StorageBlock extends Block{
             return linkedCore != null ? linkedCore.acceptItem(source, item) : items.get(item) < getMaximumAccepted(item);
         }
 
+        @Override
+        public boolean canUnload(){
+            return linkedCore == null ? super.canUnload() : linkedCore.canUnload();
+        }
+
         @Override
         public void handleItem(Building source, Item item){
             if(linkedCore != null){