{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"err.span_labels(used_private_fields.iter().map(|(_,"}]}
        err.span_labels(used_private_fields.iter().map(|(_, span, _)| *span), "private field");
            .partition(|field| field.2);
        if !remaining_private_fields.is_empty() {