@interface NSUnitConcentrationMass : NSDimension <NSSecureCoding> @property (class, nonatomic, readonly) BOOL supportsRegionalPreference; @property (class, readonly, copy) NSUnitConcentrationMass *gramsPerLiter; @property (class, readonly, copy) NSUnitConcentrationMass *milligramsPerDeciliter; @property (class, readonly) BOOL supportsSecureCoding; + (void)initialize; + (id)icuType; + (id)baseUnit; + (id)millimolesPerLiterWithGramsPerMole:(double)a0; @end