Invalidating association second level cache

second-level-cache.classes.php

<?php namespace App\Entities;

// IGNORE THE CONFIGURATION DETAILS :-)

/**
 * @Entity
 * @Cache(usage="NONSTRICT_READ_WRITE")
 */
class Post {
    /**
     * @Cache("NONSTRICT_READ_WRITE")
     * @OneToMany(targetEntity="App\Entities\Comment", mappedBy="post", cascade={"all"})
     */
    private $comments;
    
    public function addComment(Comment $comment)
    {
        $this->comments->add($comment);
    }
}

/**
 * @Entity
 * @Cache(usage="NONSTRICT_READ_WRITE")
 */
class Comment {
    /**
     * @Cache("NONSTRICT_READ_WRITE")
     * @ManyToOne(targetEntity="App\Entities\Post")
     */
    private $post;
}

second-level-cache.main.php

<?php
$user = $entityManager->find(App\Entities\User::class, 1);
$post = $entityManager->find(App\Entities\Post::class, 1);

$comment = new App\Entities\Comment($user, $post, 'Hello world!');

$post->addComment($comment);

// Should this be enough to invalidate $post->comments ?
$entityManager->persist($post);
$entityManager->flush();