{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"Some(ty::ImplPolarity::Positive)"}]}
                Some(ty::ImplPolarity::Positive) | None => {
                // `None` means this is an inherent impl
                    res = res.and(check_impl(tcx, item, impl_.self_ty, &impl_.of_trait));