for (Element value : values) {
        dummy |= map.remove(value) == null;
      }
    }
    return dummy;
  }

  @Benchmark
  boolean iterateWithEntrySet(int reps) {
    Map<Element, Element> map = mapToTest;

    boolean dummy = false;
    for (int i = 0; i < reps; i++) {
      for (Map.Entry<Element, Element> entry : map.entrySet()) {