docs: @Pure
  	public static double toMetersPerSecond(double value, SpeedUnit inputUnit) {
  		switch (inputUnit) {
  		case KILOMETERS_PER_HOUR:
  			return 3.6 * value;
  		case MILLIMETERS_PER_SECOND:
  			return value / 1000.;
  		case METERS_PER_SECOND:
  		default:
  		}
  		return value;
  	}