{"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"match"}]}
    match &mut result[local] {
fn push_mut_span(local: LocalId, span: MirSpan, result: &mut ArenaMap<LocalId, MutabilityReason>) {
        MutabilityReason::Mut { spans } => spans.push(span),