{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"if"}]}
            if let hir::ConstArgKind::Path(qpath) = cnst.kind
        (GenericArg::Const(cnst), GenericParamDefKind::Type { .. }) => {
                && let rustc_hir::QPath::Resolved(_, path) = qpath