zeolite-lang-0.24.0.0: src/Test/testfiles/covariant_refines_invariant.0rx
@value interface Object1<|#x> { }
@value interface Object2<#z> { }
@value interface Object3<|#y> {
// Despite matching variance with Object1, Object2 turns it into invariant.
refines Object2<Object1<#y>>
}