{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"it"}]}
        it @ (MutabilityReason::Not | MutabilityReason::Unused) => {
        MutabilityReason::Mut { spans } => spans.push(span),
            *it = MutabilityReason::Mut { spans: vec![span] }