Manipulating Permissions

I been trying to manipulate permissions, but I don't really know how to. I been looking at PurePerms, but I don't understand it. What are attachments? Can someone explain a way to manage/manipulate permissions? Thanks!

$player->setPermission(); ?
$player->hasPermission(); ?

Btw did you know Pocketmine has API Documentation @ http://www.docs.pocketmine.net/ You can find good information there you don't need to ask here directly

It is http://jenkins.pocketmine.net/job/PocketMine-MP-doc/doxygen/, not that one.

I have looked in the docs, but it doesn't really show a example that I understand.

GrabBag (http://forums.pocketmine.net/plugins/grabbag.1060/) has a very basic permissions manager. Perhaps it makes for a better example than PurePerms. It simply shows permissions, and lets you change them.

The code is here:
https://github.com/alejandroliu/poc...ter/GrabBag/src/aliuly/grabbag/CmdPermMgr.php