{"ast_node_type":"variable","tokens":[{"end":109,"kind":"keyword","start":0,"text":"let"}]}
            let Impl { defaultness, safety, generics, constness, polarity, of_trait, self_ty, items } = self;
        impl_walkable!(|&$($mut)? $($lt)? self: Impl, vis: &mut V| {
            visit_visitable!($($mut)? vis, defaultness, safety, generics, constness, polarity, of_trait, self_ty);