{"ast_node_type":"function","tokens":[{"end":72,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_impl_item_post(a: &'tcx rustc_hir::ImplItem<'tcx>);
            fn check_impl_item(a: &'tcx rustc_hir::ImplItem<'tcx>);
            fn check_struct_def(a: &'tcx rustc_hir::VariantData<'tcx>);