private void addUnitsFromConverter(IDimensionConverterFor converter)
 {
     TargetDimensions.Where(converter.CanConvertTo).Each(dim => { _units.AddRange(dim.Units); });
 }
 private IDimension targetDimensionWith(Unit unit)
 {
     return(TargetDimensions.FirstOrDefault(dimensions => dimensions.Units.Contains(unit)));
 }