text: //
  //  NSSet+Disjoint.h
  //  Apollo_OC
  //
  //  Created by Travel Chu on 4/17/17.
  //  Copyright © 2017 demo. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  
  @interface NSSet (Disjoint)
  
  - (BOOL)isDisjointWithSet:(NSSet *)other;
  
  @end
  