{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"(Some(prec),"}]}
                (Some(prec), _) => constraint.span.with_lo(prec.hi()),
            let removal_span = match (preceding_span, next_span) {
                (None, Some(next)) => constraint.span.with_hi(next.lo()),