default <R1, R2, A1, A2> Tuple2<R1, R2> collect(
        Collector<? super T, A1, R1> collector1,
        Collector<? super T, A2, R2> collector2
    ) {
        return collect(Tuple.collectors(collector1, collector2));
    }
Collect this collectable into 2 {@link Collector}s.
jOOL-java-8/src/main/java/org/jooq/lambda/Collectable.java