{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"BoundConstness::Always(span)"}]}
            BoundConstness::Always(span) => BoundConstness::Always(self.lower_span(span)),
            BoundConstness::Never => BoundConstness::Never,
            BoundConstness::Maybe(span) => BoundConstness::Maybe(self.lower_span(span)),