How do I get the Project Area of an Iteration

Hello
My task is to create a method that can export all plans of a project to a textfile. After searching for a long time, I've finally found a method to get the plans programmatically:
https://jazz.net/wiki/bin/view/Main/InformalProjectCopy (under "Agile Planning")

List<IIterationPlanRecordHandle> handles= source.fetchAllIterationPlans(ItemProfile.createFullProfile(IIterationPlanRecord.ITEM_TYPE), monitor);
List<IIterationPlanRecord> plans= source.getItemManager().fetchCompleteItems(handles, IItemManager.DEFAULT, monitor);

However, this method gets me all plans of all project areas that I have access to, and I can't find a way to filter only the plans that are in the current project area. That's why I made a subfunction that whould check if the iteration lies within the current project area. The problem is, that I can't find an option to get the project area of an iteration, and looping the getParent command also doesn't work, because it only gets to the top level iteration, but not the Project Area itself.
I'd either need an option to only search through the current project area with the linked method, or a command to get the project area of an iteration. If anyone knows a way to do any of these, I'd much appreciate the help.

Thanks