title: is "connected" a private api?
body: <p>Is "connected" a private API? apple told me so.
  Appstore was saying I have used a private API when I submit my app :</p>
  
  <blockquote>
    <p>Performance - 2.5.1</p>
    
    <p>Your app still uses or references the following non-public APIs:</p>
    
    <p>connected</p>
    
    <p>The use of non-public APIs is not permitted on the App Store because
    it can lead to a poor user experience should these APIs change.</p>
    
    <p>Next Steps</p>
    
    <p>Please revise your app to remove any non-public APIs. If you have
    defined methods in your source code with the same names as the
    above-mentioned APIs, we suggest altering your method names so that
    they no longer collide with Apple's private APIs to avoid your
    application being flagged in future submissions.</p>
    
    <p>Additionally, if you are using third party libraries, please update to
    the most recent version of those libraries. If you do not have access
    to the libraries' source, you may be able to search the compiled
    binary using the "strings" or "otool" command line tools. The
    "strings" tool can output a list of the methods that the library calls
    and "otool -ov" will output the Objective-C class structures and their
    defined methods. These tools can help you narrow down where the
    problematic code resides. You could also use the "nm" tool to verify
    if any third-party libraries are calling these APIs.</p>
  </blockquote>
  
  <p>Is this sure? or they made a mistake?</p>
  
  <p>Thank you very much!</p>