Objective-C++ bridge to C++ Creatinine Clearance calculation

CCbridgeCode.mm

#import "PKMCreatinineClearance.h"
#import "PKMConvert.h"
#import "CreatinineClearance.h"

@interface PKMCreatinineClearance ()
@property (nonatomic, assign) PKMath::CreatinineClearance* ccInstance;
@end

@implementation PKMCreatinineClearance

- (nullable instancetype)initWith:(double)age
                           height:(double)height
                           weight:(double)weight
                              scr:(double)scr
                           gender:(PKMGender)gender
{
    if (self = [super init]) {
        Gender pkGender = [PKMConvert genderFromPKMGender:gender];
        _ccInstance = new PKMath::CreatinineClearance(age, height, weight, scr, pkGender);
    }
    return self;
}

- (void)dealloc
{
    delete _ccInstance;
}

- (double)calculate
{
    return self.ccInstance->Calculate();
}

- (BOOL)clampedClcr
{
    return self.ccInstance->ClampedClcr();
}

@end