public void GivenVariableNumberWhenSubtractVariableNumberFromSourceShouldDoThat()
        {
            var uom = _ftUnitOfMeasure.ToModelUom();
            var firstValue = new NumericValue(uom, 24.68);
            var secondValue = new NumericValue(uom, 10.11);
            var firstNumber = new NumericRepresentationValue(RepresentationInstanceList.vrABShiftTrack.ToModelRepresentation(), firstValue);
            var secondNumber = new NumericRepresentationValue(RepresentationInstanceList.vrABShiftTrack.ToModelRepresentation(), secondValue);

            firstNumber.SubtractFromSource(secondNumber);
            Assert.AreEqual(14.57, firstNumber.Value.Value);
        }
        public void GivenVariableNumberAndDoubleWhenSubtractFromSourceShouldDoThat()
        {
            var uom = _ftUnitOfMeasure.ToModelUom();
            var value = new NumericValue(uom, 24.68);
            var number = new NumericRepresentationValue(RepresentationInstanceList.vrABShiftTrack.ToModelRepresentation(), value);
            number.SubtractFromSource(10.11);

            Assert.AreEqual(14.57, number.Value.Value);
        }