How to get list of issues from a release when capturing VersionReleaseEvent

[Jose A. Íñigo]

I'm implementing a Jira Server Plugin with a listener that captures every VersionReleaseEvent:

@EventListener
public void onVersionReleaseEvent(VersionReleaseEvent versionReleaseEvent) {
    log.info("#### onVersionReleaseEvent {}", versionReleaseEvent);
}

 I need to know which issues are included in that versionRelease, but the VersionReleaseEvent class doesn't include them. How can I access that information?