return "", "", s, ErrHeader
	}
	n -= int64(len(nStr) + 1) // convert from index in s to index in rest
	if n <= 0 {
		return "", "", s, ErrHeader
	}

	// Extract everything between the space and the final newline.
	rec, nl, rem := rest[:n-1], rest[n-1:n], rest[n:]
	if nl != "\n" {
		return "", "", s, ErrHeader
	}

	// The first equals separates the key from the value.

	{"$0", "$0"},
	{"$0.5", "$(0.5)"},
	{"0(R26)", "(R26)"},
	{"0(RSP)", "(RSP)"},
	{"$1", "$1"},
	{"$-1", "$-1"},
	{"$1000", "$1000"},
	{"$1000000000", "$1000000000"},
	{"$0x7fff3c000", "$34358935552"},
	{"$1234", "$1234"},
	{"$~15", "$-16"},
	{"$16", "$16"},
	{"-16(RSP)", "-16(RSP)"},
	{"16(RSP)", "16(RSP)"},
	{"1(R1)", "1(R1)"},
	{"-1(R4)", "-1(R4)"},
	{"18740(R5)", "18740(R5)"},

        new CollectionBenchmarkSampleData(true, random, 0.8, size);
    setToTest = (Set<Element>) impl.create(sampleData.getValuesInSet());
  }

  @Benchmark
  int iteration(int reps) {
    int x = 0;

    for (int i = 0; i < reps; i++) {
      for (Element y : setToTest) {
        x ^= System.identityHashCode(y);
      }
    }
    return x;
  }

    if (omitNulls) {
      helper = helper.omitNullValues();
    }
    return helper;
  }

  @Benchmark
  int toString(int reps) {
    int dummy = 0;
    for (int i = 0; i < reps; i++) {
      MoreObjects.ToStringHelper helper = newHelper();
      for (int j = 0; j < dataSize; ++j) {
        dataset.addEntries(helper);
      }

    if (num >= 0) {
      Object[] rest = new Integer[num];
      for (int i = 0; i < num; i++) {
        rest[i] = partsArray[i + 2];
      }

      assertEquals(expected, joiner.join(partsArray[0], partsArray[1], rest));

      StringBuilder sb3 = new StringBuilder().append('x');
      joiner.appendTo(sb3, partsArray[0], partsArray[1], rest);
      assertEquals("x" + expected, sb3.toString());
    }

  void setUp() {
    testBytes = new byte[size];
    new Random(RANDOM_SEED).nextBytes(testBytes);
  }

  @Benchmark
  byte hashing(int reps) {
    byte result = 0x01;
    HashMethod hashMethod = this.hashMethod;
    Algorithm algorithm = this.algorithm;
    for (int i = 0; i < reps; i++) {
      result ^= hashMethod.hash(algorithm, testBytes)[0];
    }
    return result;
  }

  void setUp() {
    testBytes = new byte[size];
    new Random(RANDOM_SEED).nextBytes(testBytes);
  }

  @Benchmark
  byte hashing(int reps) {
    byte result = 0x01;
    HashMethod hashMethod = this.hashMethod;
    Algorithm algorithm = this.algorithm;
    for (int i = 0; i < reps; i++) {
      result ^= hashMethod.hash(algorithm, testBytes)[0];
    }
    return result;
  }

   * objects in any other equivalence group added to this tester.
   */
  @CanIgnoreReturnValue
  public EquivalenceTester<T> addEquivalenceGroup(T first, T... rest) {
    addEquivalenceGroup(Lists.asList(first, rest));
    return this;
  }

  @CanIgnoreReturnValue
  public EquivalenceTester<T> addEquivalenceGroup(Iterable<T> group) {
    delegate.addRelatedGroup(group);

   * objects in any other equivalence group added to this tester.
   */
  @CanIgnoreReturnValue
  public EquivalenceTester<T> addEquivalenceGroup(T first, T... rest) {
    addEquivalenceGroup(Lists.asList(first, rest));
    return this;
  }

  @CanIgnoreReturnValue
  public EquivalenceTester<T> addEquivalenceGroup(Iterable<T> group) {
    delegate.addRelatedGroup(group);

    if (num >= 0) {
      Object[] rest = new Integer[num];
      for (int i = 0; i < num; i++) {
        rest[i] = partsArray[i + 2];
      }

      assertEquals(expected, joiner.join(partsArray[0], partsArray[1], rest));

      StringBuilder sb3 = new StringBuilder().append('x');
      joiner.appendTo(sb3, partsArray[0], partsArray[1], rest);
      assertEquals("x" + expected, sb3.toString());
    }