title: Listener for lazy-loading fields in JPA entity
body: <p>Is it possible to add a custom listener/hook which would be triggered after loading a lazy field of an entity (e.g. <code>@OneToMany</code> collection) where you can put your custom code?</p>
  <p>I can imagine something similar to <code>@PostLoad</code> annotation but which would be triggered later, at the 1st access to the lazy field.</p>
  <p>No biggie if it's possible but without reference to the concrete field.</p>