assertThat(Doubles.indexOf(new double[] {4.0, 3.0, 2.0}, new double[] {2.0, 3.0, 4.0}))
        .isEqualTo(-1);

    for (double value : NUMBERS) {
      assertWithMessage("" + value)
          .that(Doubles.indexOf(new double[] {5.0, value, value, 5.0}, new double[] {value, value}))
          .isEqualTo(1);
    }
    assertThat(Doubles.indexOf(new double[] {5.0, NaN, NaN, 5.0}, new double[] {NaN, NaN}))

        if (crudMode != expectedMode) {
            throwValidationError(messages -> {
                messages.addErrorsCrudInvalidMode(GLOBAL, String.valueOf(expectedMode), String.valueOf(crudMode));
            }, this::asListHtml);
        }
    }

    // ===================================================================================

        if (crudMode != expectedMode) {
            throwValidationError(messages -> {
                messages.addErrorsCrudInvalidMode(GLOBAL, String.valueOf(expectedMode), String.valueOf(crudMode));
            }, this::asListHtml);
        }
    }

    // ===================================================================================

        if (crudMode != expectedMode) {
            throwValidationError(messages -> {
                messages.addErrorsCrudInvalidMode(GLOBAL, String.valueOf(expectedMode), String.valueOf(crudMode));
            }, this::asListHtml);
        }
    }

    // ===================================================================================

    // seem to be a worthwhile tradeoff in a browser.
    return matcher;
  }

  static String formatCompact4Digits(double value) {
    return toPrecision(value, 4);
  }

  @JsMethod(name = "Number.prototype.toPrecision.call", namespace = JsPackage.GLOBAL)
  private static native String toPrecision(double value, int precision);

  @JsMethod
  static native boolean stringIsNullOrEmpty(@Nullable String string) /*-{
    return !string;

}

// Value implements driver.Valuer interface
func (s serializer) Value() (driver.Value, error) {
	return s.SerializeValuer.Value(s.Context, s.Field, s.Destination, s.fieldValue)
}

// SerializerInterface serializer interface
type SerializerInterface interface {
	Scan(ctx context.Context, field *Field, dst reflect.Value, dbValue interface{}) error
	SerializerValuerInterface
}

// SerializerValuerInterface serializer valuer interface

        final Map<String, Object> requestBody = new HashMap<>();
        final String keyProp = NAME_PREFIX + id;
        requestBody.put(KEY_PROPERTY, keyProp);
        requestBody.put("duplicate_host_name", "duplicate_" + Integer.valueOf(id).toString());
        requestBody.put("sort_order", id);
        return requestBody;
    }

    @Override
    protected Map<String, Object> getUpdateMap() {

        final String keyProp = NAME_PREFIX + id;
        requestBody.put(KEY_PROPERTY, keyProp);
        requestBody.put("query", "query" + id);
        requestBody.put("max_size", Integer.valueOf(id).toString());
        requestBody.put("boost", 100);
        return requestBody;
    }

    @Override
    protected Map<String, Object> getUpdateMap() {

        requestBody.put(KEY_PROPERTY, keyProp);
        requestBody.put("value", Integer.valueOf(id).toString());
        return requestBody;
    }

    @Override
    protected Map<String, Object> getUpdateMap() {
        final Map<String, Object> updateMap = new HashMap<>();
        updateMap.put("value", "newValue");
        return updateMap;
    }

    @Test
    void crudTest() {

        bean.aaa = "1,000";
        final Bean2 bean2 = new Bean2();
        BeanUtil.copyBeanToBean(bean, bean2, converter(new NumberConverter("#,##0")));
        assertThat(bean2.aaa, is(Integer.valueOf(1000)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyBeanToMap() throws Exception {
        final SrcBean src = new SrcBean();
        src.aaa = "aaa";