private @NotNull Set<NewColorAndFontPanel> getPanels() {
    if (mySubPanelFactories == null) return new HashSet<>();

    Set<NewColorAndFontPanel> result = new HashSet<>();
    for (InnerSearchableConfigurable configurable : mySubPanelFactories.values()) {
      NewColorAndFontPanel panel = configurable.getSubPanelIfInitialized();
      if (panel != null) {
        result.add(panel);
      }
    }
    return result;
  }
private @NotNull Set<NewColorAndFontPanel> getPanels()