{"ast_node_type":"function","tokens":[{"end":75,"kind":"keyword","start":0,"text":"fn"}]}
            fn check_ty(a: &'tcx rustc_hir::Ty<'tcx, rustc_hir::AmbigArg>);
            fn check_expr_post(a: &'tcx rustc_hir::Expr<'tcx>);
            fn check_generic_param(a: &'tcx rustc_hir::GenericParam<'tcx>);