So i've just been looking at this, and big caveat, unless i'm doing something silly, there is a massive problem with this..
I've got 54 alarms showing up based on the state / priority filters in the properties, sweet. all good.
However, if i add some custom code to the extension function "filterAlarms", and filter out some stuff, that filtered dataset is not being reflected here in the results data property.. 
Sadly I can't use the inbuilt filters shown above, as i'm filtering on custom Alarm Associated Data..
If anyone has figured this one out that'd be great..
I'm trying to reflect an accurate alarm count based on this "results" property, but it all goes pearshaped when the extension filter kicks in..