Iterator<Integer> resultIterator = iterable.iterator();
    resultIterator.next();

    assertThrows(NumberFormatException.class, () -> resultIterator.next());
  }

  private static final class StringValueOfFunction implements Function<Integer, String> {
    @Override
    public String apply(Integer from) {
      return String.valueOf(from);
    }
  }

  public void testTransformWith_nullFriendlyTransform() {