public function getInstallable($list_type_installed = ['plugins' => true, 'themes' => true])
    {
        $items = ['total' => 0];
        foreach ($list_type_installed as $type => $type_installed) {
            if ($type_installed === false) {
                continue;
            }
            $methodInstallableType = 'getInstalled' . ucfirst($type);
            $to_install = $this->$methodInstallableType();
            $items[$type] = $to_install;
            $items['total'] += count($to_install);
        }
        return $items;
    }