docs: public final Post withChildren(final List<Post> children) {
        return new Post(id, slug, title, excerpt, content, authorId, author,
                publishTimestamp, modifiedTimestamp, status, parentId,
                guid, commentCount, this.metadata, type, mimeType, taxonomyTerms,
                children != null ? ImmutableList.copyOf(children) : ImmutableList.of());
     }