TestUser.m

@interface TestUser ()
@property (copy, nonatomic) NSString *modelIdentifier;
@end


@implementation TestUser

@dynamic name;

- (instancetype)initWithIdentifier:(NSString *)identifier
{
    self = [self init];
    if (self)
    {
        self.modelIdentifier = identifier;
    }
    
    return self;
}

@end