{"ast_node_type":"other","tokens":[{"end":28,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
impl<'tcx> TypeError<'tcx> {
#[extension(pub trait TypeErrorToStringExt<'tcx>)]
    fn to_string(self, tcx: TyCtxt<'tcx>) -> Cow<'static, str> {