Multi Selection parameterized fixlet

Hi Community,
I’m wanting to create a parameterized fixlet that will allow users to select services they want monitored by our monitoring app. is there a UI that will allow users to select multiple selections that will create some sort of array/tuple (i.e. check boxes). i tried ‘multilinetext’ but that only picked up the first option I selected. Any input would be greatly appreciated.

thanks in advance!
Raul