protected function browse(string $type, int $start = 0, int $limit = 1)
    {
        return $this->soap("ContentDirectory", "Browse", [
            "BrowseFlag"        =>  "Browse{$type}",
            "StartingIndex"     =>  $start,
            "RequestedCount"    =>  $limit,
            "Filter"            =>  "",
            "SortCriteria"      =>  "",
        ]);
    }