@Override
      ID initialize() {
        return invoke(invoke("NSDistributedNotificationCenter", "defaultCenter"),
                      "addObserver:selector:name:object:",
                      createDelegate("JBScrollBarBehaviorObserver", createSelector("handleBehaviorChanged:"), this),
                      createSelector("handleBehaviorChanged:"),
                      nsString("AppleNoRedisplayAppearancePreferenceChanged"),
                      ID.NIL,
                      2 // NSNotificationSuspensionBehaviorCoalesce
        );
      }
@Override
      ID initialize()