This release is very simple. It exposes the UserAgent get/set functions to you.
$ExpiringMedia = new FreshVine\ExpiringMediaCache\ExpiringMediaCache( '/var/www/html/media/', 'http://localhost:8080/media/' );
$ExpiringMedia->setUserAgent('This is a user agent, though very much not correct');
$ExpiringMedia->getUserAgent();
Enjoy!