private boolean checkReused() {
    EDT.assertIsEdt();
    if (myPresentableArranger != myArranger) {
      myPresentableArranger = myArranger;

      clearIfLookupAndArrangerPrefixesMatch();

      myPresentableArranger.prefixChanged(this);
      return true;
    }
    return false;
  }
private boolean checkReused()