Get Access of other Folders

Hey there, I want to look with a Plugin whether a Player is written down in a File which is placed in the Folder Teams in Plugins but I only know

PHP:

$this->getDataFolder()

so how do I get Access to a Folder of another Plugin?

Code:

$this->getServer()->getPluginManager()->getPlugin("MyPlugin")->getDataFolder()

Of course, error checking is left as an exercise to the reader...

Thanks! Error is the missing ; isn't it? xD

PHP:

$this->getServer()->getPluginManager()->getPlugin("MyPlugin")->getDataFolder();