@Override
  public void addCell(@NotNull ListPluginComponent component, @Nullable ListPluginComponent anchor) {
    if (anchor == null) {
      myComponents.add(component);
    }
    else {
      myComponents.add(myComponents.indexOf(anchor), component);
    }
  }
@Override
  public void addCell(@NotNull ListPluginComponent component, @Nullable ListPluginComponent anchor)