Referencing to mainApp(PApplet) instead of "this"

Hi, I would like to use the gif library out of a class that I have written. If I write something like:
Gif myAnimation = new Gif(this, myFile);
...Processing gives an error as it references to my class and not my main App. How do I reference to main sketch? I am pretty sure it has something to do with PApplet, but I can not get it working! Thank you!