String toTest =
        MoreObjects.toStringHelper(new TestClass())
            .omitNullValues()
            .omitNullValues()
            .add("field1", "Hello")
            .omitNullValues()
            .add("field2", "Googley")
            .omitNullValues()
            .add("field3", "World")
            .toString();

    String toTest =
        MoreObjects.toStringHelper(new TestClass())
            .omitNullValues()
            .omitNullValues()
            .add("field1", "Hello")
            .omitNullValues()
            .add("field2", "Googley")
            .omitNullValues()
            .add("field3", "World")
            .toString();

     * methods, is not significant.
     *
     * @since 18.0 (since 12.0 as {@code Objects.ToStringHelper.omitNullValues()}).
     */
    @CanIgnoreReturnValue
    public ToStringHelper omitNullValues() {
      omitNullValues = true;
      return this;
    }

    /**
     * Adds a name/value pair to the formatted output in {@code name=value} format. If {@code value}

     * methods, is not significant.
     *
     * @since 18.0 (since 12.0 as {@code Objects.ToStringHelper.omitNullValues()}).
     */
    @CanIgnoreReturnValue
    public ToStringHelper omitNullValues() {
      omitNullValues = true;
      return this;
    }

    /**
     * Adds a name/value pair to the formatted output in {@code name=value} format. If {@code value}

  private MoreObjects.ToStringHelper newHelper() {
    MoreObjects.ToStringHelper helper = MoreObjects.toStringHelper("klass");
    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();

  private MoreObjects.ToStringHelper newHelper() {
    MoreObjects.ToStringHelper helper = MoreObjects.toStringHelper("klass");
    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();