{"ast_node_type":"function","tokens":[{"end":73,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_foreign_item(a: &'tcx rustc_hir::ForeignItem<'tcx>);
            fn check_mod(a: &'tcx rustc_hir::Mod<'tcx>, b: rustc_hir::HirId);
            fn check_item(a: &'tcx rustc_hir::Item<'tcx>);