/wro4j-core/src/main/java/ro/isdc/wro/model/resource/support/change/ResourceWatcher.java
checkResourceChange( resource, callback, isChanged) ;
checkResourceChange ( resource, group, callback, isChanged ) ;
for (final Resource resource : resources) { if (isAsync) { futures.add(executorServiceRef.get().submit(ContextPropagatingCallable.decorate(new Callable<Void>() { @Override public Void call() throws Exception { <extra_id_0> return null; } }))); } else { checkResourceChange(resource, group, callback, isChanged); }