private void disposePointers() {
      SmartPointerManager pointerManager = SmartPointerManager.getInstance(myFile.getProject());
      if (startPointer != null) {
        pointerManager.removePointer(startPointer);
      }
      if (endPointer != null) {
        pointerManager.removePointer(endPointer);
      }
    }
private void disposePointers()