{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"self.dcx().emit_err(errors::BinderAndPolarity"}]}
                    self.dcx().emit_err(errors::BinderAndPolarity {
                BoundPolarity::Negative(polarity_span) | BoundPolarity::Maybe(polarity_span) => {
                        binder_span,