In case anyone else encountered this problem. You have to edit your function and check the "has return value" box. Then your return will work. After this you have to use "Call Function" again and now you have a new field for saving results.
put action/function in 'deactivate' mode
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when editing any function, sometimes we want to test by not activating certain actions/functions .. but not deleting them .. because if we delete these actions/functions, we have to put them back again after testing.
can we put them on 'de-activate' mode? .. just like when you test a batch file, you can de-activate a command line by making it into a 'comment' instead