title: ld: 1 duplicate symbol for architecture arm64
body: <p>I am trying to integrate <code>Zaius iOS SDK</code> in my app. So when i added the <code>SDK</code> and try to run i am getting following error. </p>
  
  <pre><code>duplicate symbol _kReachabilityChangedNotification in:
  
      /Users/mp/Library/Developer/Xcode/DerivedData/Hubble-
      dgvyhoahvstjstejqrwunfpqzokr/Build/Products/Debug-
      iphoneos/HubbleIosFramework.framework/HubbleIosFramework(ZReachability.o)
  
      /Users/mp/Library/Developer/Xcode/DerivedData/Hubble-
      dgvyhoahvstjstejqrwunfpqzokr/Build/Products/Debug-
      iphoneos/HubbleIosFramework.framework/HubbleIosFramework(Reachability.o)
  
  ld: `1 duplicate symbol for architecture arm64`
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>Error showing that two duplicate file exit which is <code>ZReachability.o</code> and <code>Reachability.o</code>.</p>
  
  <p>I have deleted <code>Reachability class</code> and try to import <code>ZReachability.h</code> but its showing file not exit. May be <code>SDK</code> keep ZReachability.h private.</p>
  
  <p>What can i do else to resolve this issue? </p>