Members.filter not working 1.8.3?

Just changed my files over to 1.8.3 recently. I use the persistent script from the OH1.8 examples. The main problem I have is with (I tried both curved and square parenthesis):

if(gMobiles.members.filter[s | s.state == ON].size == 0) {

I get the error…

The name ‘.filter()’ cannot be resolved to an item or type.

any ideas?

Nevermind, upgraded java… Apparently it’s the same reason why my.openhab wasn’t working… Who would’ve guessed