{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let optimizing = &mut inverse_memory_index.raw[..end];
        let end = if let StructKind::MaybeUnsized = kind { fields.len() - 1 } else { fields.len() };
        let fields_excluding_tail = &fields.raw[..end];