@Override
  public double getDoubleValue() {
    checkValueType(DOUBLE);
    return measure.getDoubleValue();
  }
@Test
  public void get_double_value() {
    MeasureImpl measure = new MeasureImpl(Measure.newMeasureBuilder().create(1d, 1));
    assertThat(measure.getDoubleValue()).isEqualTo(1d);
  }