code: public static <T> Predicate<T> iterablePresent() {
          return t -> t instanceof Iterable ? ((Iterable) t).iterator()
                                                            .hasNext()
                  : false;
      }
docs: <pre>
  {@code
  import static cyclops2.function.Predicates.valuePresent;
  
  Seq.of(Arrays.asList(),Arrays.asList(1),null)
  .filter(iterablePresent());
  
  //Seq[List[1]]
  }
  </pre>
  @return A Predicate that checks if it's input is an Iterable with at least one value