code: public <T2, R> ValueTransformer<W,R> zip(Iterable<? extends T2> iterable,
              BiFunction<? super T, ? super T2, ? extends R> fn) {
          return this.unitAnyM(this.transformerStream().map(v->v.zip(iterable,fn)));
      }
docs: /* (non-Javadoc)
  @see com.oath.cyclops.types.Zippable#zip(java.lang.Iterable, java.util.function.BiFunction)