{"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"BoundPolarity::Negative(span)"}]}
            BoundPolarity::Negative(span) => BoundPolarity::Negative(self.lower_span(span)),
            BoundPolarity::Positive => BoundPolarity::Positive,
            BoundPolarity::Maybe(span) => BoundPolarity::Maybe(self.lower_span(span)),