{"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"ty:"}]}
        ty: RevealedTy<'tcx>,
        ctor: &Constructor<'p, 'tcx>,
    ) -> impl Iterator<Item = (RevealedTy<'tcx>, PrivateUninhabitedField)> + ExactSizeIterator {