{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
                let full_impl_span = tcx.hir_span_with_body(tcx.local_def_id_to_hir_id(impl_id));
            if !is_implemented_here {
                match tcx.eval_default_body_stability(trait_item_id, full_impl_span) {