{"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
    impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for ConstrainedCollectorPostHirTyLowering {
    use ty::Ty;
        fn visit_ty(&mut self, t: Ty<'tcx>) {