Method setAsRelative

src/utilities/units/Quantity.cpp:135–142

}

void Quantity::setAsRelative() {
  OptionalTemperatureUnit tu = m_units.optionalCast<TemperatureUnit>();
  if (!tu) {
    LOG_AND_THROW("Could not Quantity::setAsRelative for quantity " << *this << " because it is in system " << system().valueName()
                                                                    << ", not Celsius or Fahrenheit.");
  }
  tu->setAsRelative();
}

void Quantity::lbmToLbf() {
  OptionalIPUnit iu = m_units.optionalCast<IPUnit>();