AdditionFrameworkInterop.m

// AdditionFrameworkInterop.m

#import "AdditionFrameworkInterop.h"
@import AdditionalSDK;

// You can adopt protocols from additional framework even if its weak linked
@interface AdditionFrameworkInterop() <PrimeNumberCheckerDelegate>  
@property (strong, nonatomic) PrimeNumberChecker *primeChecker;
@end

@implementation AdditionFrameworkInterop
  
+ (BOOL)additionalModuleAvailable {
    // ...
}

- (instancetype)init {
    self = [super init];
    if (self && [AdditionFrameworkInterop additionalModuleAvailable]) {
        _primeChecker = [[PrimeNumberChecker alloc] init];
        [_primeChecker setDelegate:self];
    }
    return self;
}

- (void)inspectWithNumber:(NSInteger)number {
    if ([AdditionFrameworkInterop additionalModuleAvailable]) {
        [_primeChecker inspectWithNumber:number];
    }
}

- (void)didFinishInspectingWithNumber:(NSInteger)number isPrime:(BOOL)isPrime {
    [_delegate didFinishInspectingWithNumber:number isPrime:isPrime];
}

@end