Comparing the output of protocol_getMethodDescription and _protocol_getMethodTypeEncoding

ProtocolMethodDescriptions.m

#import <Foundation/Foundation.h>
#import <objc/runtime.h>

const char *_protocol_getMethodTypeEncoding(Protocol *, SEL, BOOL isRequiredMethod, BOOL isInstanceMethod);

@protocol Tester <NSObject>
@required
- (BOOL)testDictionary:(NSDictionary *)dictionary error:(NSError **)error;
@end

int main(int argc, char *argv[]) {
    @autoreleasepool {
        struct objc_method_description description = protocol_getMethodDescription(@protocol(Tester), @selector(testDictionary:error:), YES, YES);
        NSLog(@"%s", description.types);
        // Outputs c32@0:8@16^@24
        
        const char *descriptionString = _protocol_getMethodTypeEncoding(@protocol(Tester), @selector(testDictionary:error:), YES, YES);
        NSLog(@"%s", descriptionString);
        // Outputs c32@0:8@"NSDictionary"16^@24
    }
}