code: public static Function<? super ReactiveSeq<Integer>, ? extends ReactiveSeq<Integer>> filterInts(IntPredicate b){
  
          return a->a.ints(i->i,s->s.filter(b));
      }
docs: /*
  Fluent filter operation using primitive types
  e.g.
  <pre>
  {@code
  import static cyclops.ReactiveSeq.filterInts;
  
  ReactiveSeq.ofInts(1,2,3)
  .to(filterInts(i->i>2));
  
  //[3]
  }
  </pre>