code: public static ErrorMessageFactory shouldHaveSameSizeAs(Object actual, Object actualSize, Object expectedSize) {
      return new ShouldHaveSameSizeAs(actual, actualSize, expectedSize);
    }
docs: Creates a new </code>{@link ShouldHaveSameSizeAs}</code>.
  @param actual the actual value in the failed assertion.
  @param actualSize the size of {@code actual}.
  @param expectedSize the expected size.
  @return the created {@code ErrorMessageFactory}.