static <T> Seq<T> seq(Iterator<? extends T> iterator) {
        if (iterator == null)
            return Seq.empty();
        
        return seq(spliteratorUnknownSize(iterator, ORDERED));
    }
Wrap an <code>Iterator</code> into a <code>Seq</code>.
jOOL-java-8/src/main/java/org/jooq/lambda/Seq.java