{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"let"}]}
    let non_trivial_count = non_trivial_fields.clone().count();
        .filter_map(|(span, trivial, _non_exhaustive)| if !trivial { Some(span) } else { None });
    if non_trivial_count >= 2 {