Invalid JSON feed output: 'empty' property outside of the schema

[lpellegr]

Expected Behavior

I expect author entries to be serialized without the "empty" property:

"authors": [
  {
    "name": "John Doe",
    "url": "mailto:[email protected]",
    "avatar": "https://staging.storage.noticeable.io/users/1hvH7RWx9CWe8QCskAHBcsgpbkF2/01h5m04a42c02czp09khyrx3bm-avatar.png"
  }
]

Actual Behaviour

When serialized, the JSON feed contains an empty property that is not valid:

"authors": [
  {
    "name": "John Doe",
    "url": "mailto:[email protected]",
    "avatar": "https://staging.storage.noticeable.io/users/1hvH7RWx9CWe8QCskAHBcsgpbkF2/01h5m04a42c02czp09khyrx3bm-avatar.png",
    "empty": false
  }
]

Steps To Reproduce

The issue comes from this code:

https://github.com/micronaut-projects/micronaut-rss/blob/4.4.x/jsonfeed-core/src/main/java/io/micronaut/rss/jsonfeed/JsonFeedAuthor.java

I guess a @JsonIgnore annotation or Serde equivalent should be used on public boolean isEmpty() {.

Environment Information

No response

Example Application

No response

Version

4.4.2