{"ast_node_type":"variable","tokens":[{"end":69,"kind":"keyword","start":0,"text":"let"}]}
            let containing_item = tcx.hir_expect_item(parent_def_id);
            let parent_def_id = tcx.hir_get_parent_item(impl_item.hir_id()).def_id;
            let containing_impl_is_for_trait = match &containing_item.kind {