Set Analysis within Organization Chart?

[cander19]

I have an organization chart and a filter for the 10 'functions' (Teams 1-10). By default, if no filter is selected, I only want to show 9 of the functions. But, if user selects a function from the filter pane, it displays accordingly. I tried using this expression on both dimensions but it did not work:

=if(GetSelectedCount([Function])=0,{<[Function]-={'Team10'}>}[Position Number],[Position Number])

=if(GetSelectedCount([Function])=0,{<[Function]-={'Team10'}>}[Reports to position],[Reports to position])

Is there a way to achieve this result?