Get a list of galleries from an album in NextGEN Gallery [closed]

Question

I want to get a list of galleries of a certain album. Than I would create a link to this galleries. How do I get the list of galleries in PHP?

I saw that there is some code like

global $nggdb;
$gallery = $nggdb->get_gallery ($galleryID, 'sortorder', 'ASC', true, 0, 0);

but is there some documentation which functions I could use?