public static <T> Collector<T, ?, Seq<T>> maxAll(Comparator<? super T> comparator) {
        return maxAllBy(t -> t, comparator);
    }
Get a {@link Collector} that calculates the <code>MAX()</code> function, producing multiple results.
jOOL-java-8/src/main/java/org/jooq/lambda/Agg.java