{"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"cx.dropless_arena.alloc_from_iter("}]}
            cx.dropless_arena.alloc_from_iter(
        ) -> &'a [(RevealedTy<'tcx>, PrivateUninhabitedField)] {
                iter.map(|ty| cx.reveal_opaque_ty(ty))