Find the working set a project is assigned to

I want to find out to which working sets a开发者_运维问答 project is assigned to in my workspace. I don't want to get all the working sets from the WorkingSetManager and browse through all the working sets. That takes to much time.

Is there another way to find the 'parents' of a project ?

Thank you

PS: I need to do this programatically

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If you right click on the project and click on the "Assign Working Sets..." it should have the working set(s) that it belongs to already checked off in the pop-up.