@Override
        public String toString() {
            return new StringJoiner(", ", ClazzAndMetadata.class.getSimpleName() + "[", "]")
                 .add("metadata=" + metadata)
                 .add("klazz=" + klazz)
                 .toString();
        }
Turn JsonNode structure into an @ApimanEvent extending IVersionedApimanEvent
manager/api/rest-impl/src/main/java/io/apiman/manager/api/events/EventFactory.java