text: //
  //  PingOperation.h
  //
  //  Created by Michael Mavris on 03/11/2016.
  //  Copyright © 2016 Miksoft. All rights reserved.
  //
  
  #import "SimplePing.h"
  
  @interface PingOperation : NSOperation <SimplePingDelegate> {
      BOOL _isFinished;
      BOOL _isExecuting;
  }
  -(nullable instancetype)initWithIPToPing:(nonnull NSString*)ip andCompletionHandler:(nullable void (^)(NSError  * _Nullable error, NSString  * _Nonnull ip, NSTimeInterval delay))result;
  
  @end
  