Rule for Serpulo core unloaders taking items from the core

core/src/mindustry/mod/ContentParser.java

@@ -394,6 +394,13 @@ public class ContentParser{
             }
         }
 
+        @Override
+        protected Object newInstance(Class type){
+            Object o = super.newInstance(type);
+            onNewInstance(o, type);
+            return o;
+        }
+
         @Override
         public <T> T readValue(Class<T> type, Class elementType, JsonValue jsonData, Class keyType){
             T t = internalRead(type, elementType, jsonData, keyType);
@@ -1347,6 +1354,8 @@ public class ContentParser{
         Log.warn(string, format);
     }
 
+    void onNewInstance(Object object, Class<?> type){}
+
     public Json getJson(){
         checkInit();
         return parser;