code: public URL getResourceURL(String name) {
  		if (name.length() == 0) return null;
  		if (name.charAt(0) == '/') name = name.substring(1);
      	for (int i = 0; i < libs.size(); i++) {
      		AbstractClassLoader cl = libs.get(i);
      		URL url = cl.loadResourceURL(name);
      		if (url != null) return url;
      	}
      	// then try on the core one
      	return AppClassLoader.class.getClassLoader().getResource(name);
  	}
docs: Search a resource.