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NSAssert( [self.delegate conformsToProtocol: @protocol( UISearchBarDelegate )], @"Some Error." );
Protocol *counter = @protocol(ReferenceCounting);
@protocol ReferenceCounting
- setRefCount:(int)count;
- (int)refCount;
- incrementCount;
- decrementCount;
@end
@interface Formatter : NSObject < Formatting, Prettifying >
@end
if ( [receiver conformsTo:@protocol(ReferenceCounting)] )
[receiver incrementCount];
@protocol B;
@protocol A
- Foo:(id <B>)anObject;
@end
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