public function countOutdated() : int
{
$exts = $this->db->run('
SELECT
*
FROM
airship_package_cache
WHERE
installed
ORDER BY
packagetype ASC,
supplier ASC,
name ASC
');
$count = 0;
foreach ($exts as $ext) {
$available = $this->getAvailableUpgrades($ext);
if (!empty($available)) {
++$count;
}
}
return $count;
}