title: Enable Application cache in WKWebView
body: <p>I am aware that offline application cache is not supported in iOS WKWebView. </p>
  
  <p>This is enabled in Safari, so I searched webkit project for the responsible code &amp; found this</p>
  
  <p><strong>WKPreferences</strong></p>
  
  <pre><code>- (void)_setOfflineApplicationCacheIsEnabled:(BOOL)offlineApplicationCacheIsEnabled;
  </code></pre>
  
  <p>Anyone familiar with this method? is it possible to enable app cache in iOS by accessing this private methods? (I am not going to ship the app to Appstore)</p>