public void apply() throws ConfigurationException {
   if (!myModifiedModificators.isEmpty()) {
     mySdkSettingsWereModified.run();
   }
   for (SdkModificator modificator : myModifiedModificators) {
     /* This should always be true barring bug elsewhere, log error on else? */
     if (modificator.isWritable()) {
       modificator.commitChanges();
     }
   }
   myModificators.clear();
   myModifiedModificators.clear();
   mySdkListChanged = false;
   final Sdk sdk = getSelectedSdk();
   myShowMoreCallback.consume(sdk);
   PyPackageManagers.getInstance().clearCache(sdk);
   Disposer.dispose(getDisposable());
 }