Fix predicate for iterator to be more declarative
Fix predicate for iterator to be more declarative

tildeio/glimmer,glimmerjs/glimmer-vm,glimmerjs/glimmer-vm,lbdm44/glimmer-vm,glimmerjs/glimmer-vm,lbdm44/glimmer-vm,tildeio/glimmer,lbdm44/glimmer-vm,tildeio/glimmer