boolean isPostComment(Comment comment) {
        return Ref.groupKindEquals(comment.getSpec().getSubjectRef(), POST_GVK);
    }
@Test
    void isPostCommentTest() {
        var comment = createComment();
        comment.getSpec()
            .setSubjectRef(Ref.of("fake-post", GroupVersionKind.fromExtension(Post.class)));

        assertThat(reasonPublisher.isPostComment(comment)).isTrue();

        comment.getSpec()
            .setSubjectRef(Ref.of("fake-post", GroupVersionKind.fromExtension(SinglePage.class)));

        assertThat(reasonPublisher.isPostComment(comment)).isFalse();
    }