Describe the feature request

Hello,
I'm using the check plugin on Icinga2 with the flag 'alert' and 'problems' to filter the ok checks, but when there are no alerts the check returns the Unknown state.
Is that possible to implement the ability to change the output, like the '-T' flag also for the 'problems' flag?
I've already tried to use it but it's not working, the output with no alerts is always Unknown
Thanks