@Override
  public @NotNull RangeMarker createRangeMarker(int startOffset, int endOffset, boolean surviveOnExternalChange) {
    return new RangeMarkerWindow(this, startOffset, endOffset, surviveOnExternalChange);
  }
@Override
  public @NotNull RangeMarker createRangeMarker(int startOffset, int endOffset, boolean surviveOnExternalChange)