{"ast_node_type":"variable","tokens":[{"end":58,"kind":"keyword","start":0,"text":"let"}]}
    let mut body_stack: Vec<Option<DefWithBody>> = vec![];
    // FIXME: accommodate range highlighting
    let mut per_body_cache: FxHashMap<DefWithBody, (FxHashSet<_>, FxHashMap<Name, u32>)> =