code: public static <T> Randomizer<T> aNewOptionalRandomizer(final Randomizer<T> delegate, final int optionalPercent) {
          return new OptionalRandomizer<>(delegate, optionalPercent);
      }
docs: Create a new {@link OptionalRandomizer}.
  
  @param delegate        the delegate randomizer to use
  @param optionalPercent the optional percent threshold
  @param <T>             the type generated by this randomizer
  @return a new {@link OptionalRandomizer}