{"ast_node_type":"other","tokens":[{"end":83,"kind":"keyword","start":0,"text":"CfgExpr::Not(Box::new(subs.next().unwrap_or(CfgExpr::Invalid)))"}]}
                    CfgExpr::Not(Box::new(subs.next().unwrap_or(CfgExpr::Invalid)))
                s if s == sym::not => {
                }