{"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"type"}]}
        type Result = ControlFlow<Span>;
    impl<'tcx> Visitor<'tcx> for LateBoundRegionsDetector<'tcx> {
        fn visit_ty(&mut self, ty: &'tcx hir::Ty<'tcx, AmbigArg>) -> ControlFlow<Span> {