{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"hir::LifetimeKind::ImplicitObjectLifetimeDefault,"}]}
            hir::LifetimeKind::ImplicitObjectLifetimeDefault,
            Ident::new(kw::UnderscoreLifetime, self.lower_span(span)),
            LifetimeSource::Other,