System/Library/PrivateFrameworks/NetworkServiceProxy.framework
NPResolver.h
@class NSObject;
@protocol OS_dispatch_source;
@interface NPResolver : NWResolver
@property (copy) id /* block */ resolveCompletionHandler;
@property (retain) NSObject<OS_dispatch_source> *resolveTimer;
- (void)observeValueForKeyPath:(id)a0 ofObject:(id)a1 change:(id)a2 context:(void *)a3;
- (void).cxx_destruct;
- (void)resolveWithCompletionHandler:(id /* block */)a0;
@end