Objectvive-C Runtime and typedef

obejctveic.m

@interface Item : NSObject @end

@implementation Item @end

typedef NSArray<Item *> Items;

@interface Cooler : NSObject
- (id)updateItems:(Items *)items;
- (id)updateItems2:(NSArray<Item *> *)items;
@end

@implementation Cooler
- (id)updateItems:(Items *)items { return nil; }
- (id)updateItems2:(NSArray<Item *> *)items { return nil; }
@end

#import <objc/runtime.h>
void DumpObjcMethods(Class clz) {

    unsigned int methodCount = 0;
    Method *methods = class_copyMethodList(clz, &methodCount);

    printf("Found %d methods on '%s'\n", methodCount, class_getName(clz));

    for (unsigned int i = 0; i < methodCount; i++) {
        Method method = methods[i];

        printf("\t'%s' has method named '%s' of encoding '%s'\n",
               class_getName(clz),
               sel_getName(method_getName(method)),
               method_getTypeEncoding(method));

    }
    
    free(methods);
}

int main(int argc, char * argv[]) {
    @autoreleasepool {
        DumpObjcMethods([Cooler class]);
        return 0;
    }
}

/// OUTPUT: is 
/// Found 2 methods on 'Cooler'
///	'Cooler' has method named 'updateItems:' of encoding '@24@0:8^{NSArray=#}16'
///	'Cooler' has method named 'updateItems2:' of encoding '@24@0:8@16'