{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
        let bound = match (self_ty.kind(), self_ty_res) {
        // Find the type of the assoc item, and the trait where the associated item is declared.
            (_, Res::SelfTyAlias { alias_to: impl_def_id, is_trait_impl: true, .. }) => {