In order to show this property, we used the non-static method to write this information out. And where is the object, or method, or whatever. Now you're really confused. My advice right now is, don't worry about it. To be safe, anything you are not sure, write out the complete path-for now.
Lets try playing around with another document method then.
Ok, maybe not so useful like this, but you get the point. Meanwhile, feel feel to play around with them.