{"ast_node_type":"function","tokens":[{"end":69,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_trait_item(a: &'tcx rustc_hir::TraitItem<'tcx>);
                e: rustc_span::def_id::LocalDefId);
            fn check_impl_item(a: &'tcx rustc_hir::ImplItem<'tcx>);