protected static ClassLoader findInheritedClassLoader(Class clazz, String producerName) {
        Class<?>[] interfazes = clazz.getInterfaces();
        for (Class interfaze : interfazes) {
            if (producerName.equals(interfaze.getName())) {
                return interfaze.getClassLoader();
            }
        }
        if (clazz.getSuperclass() == null)
            return null;
        return findInheritedClassLoader(clazz.getSuperclass(), producerName);
    }
Returns the {@link ApplicationConfigProducerRoot} that is the parent of this sub-tree, or null
if this sub-tree has no Vespa parent.
config-model/src/main/java/com/yahoo/config/model/producer/AnyConfigProducer.java