[rules-users] Can I do a Collection contains Collection?

[EdenAEL20]

I have considered doing a custom operator contains all too. Can't I use the
eval for this though like the example below? I haven't tried it yet.  

class SampleObject{
   List IDs;
}


rule "test"
no loop
  when 
        $h3: Set() from RefData.getIDs()
        r1: SampleObject()
        eval ( $h3.containsAll( r1.IDs) )
   then
        error()
end

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