private boolean checkDirty() {
    if (myEditor.getSoftWrapModel().isDirty()) {
      myDirty = true;
      return true;
    }
    if (myDirty) {
      int visibleLineCount = myEditor.getVisibleLineCount();
      int lineDiff = visibleLineCount - myLineWidths.size();
      if (lineDiff > 0) {
        myLineWidths.addAll(IntArrayList.wrap(new int[lineDiff]));
      }
      else if (lineDiff < 0) {
        myLineWidths.removeElements(visibleLineCount, visibleLineCount - lineDiff);
      }
      for (int i = 0; i < visibleLineCount; i++) {
        myLineWidths.set(i, UNKNOWN_WIDTH);
      }
      myDirty = false;
    }
    return false;
  }
private boolean checkDirty()