@Override
  public void setLineSeparatorPlacement(@Nullable SeparatorPlacement placement) {
    SeparatorPlacement old = mySeparatorPlacement;
    mySeparatorPlacement = placement;
    if (!Objects.equals(old, placement)) {
      fireChanged(false, false, false);
    }
  }
@Override
  public void setLineSeparatorPlacement(@Nullable SeparatorPlacement placement)