{"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"let"}]}
        let (impl_block_id, trait_def_id) = match self.tcx.def_kind(local_def_id) {
    fn check_impl_or_impl_item_live(&mut self, local_def_id: LocalDefId) -> bool {
            // assoc impl items of traits are live if the corresponding trait items are live