{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":".with_lo(rhs_span.lo()"}]}
                .with_lo(rhs_span.lo() + BytePos(const_idx))
            let const_span = rhs_span
                .with_hi(rhs_span.lo() + BytePos(const_idx + "const".len() as u32));