public @Nullable SearchableConfigurable findSubConfigurable(@NotNull Class<?> pageClass) {
    if (mySubPanelFactories == null) {
      getConfigurables();
    }
    for (Map.Entry<ColorAndFontPanelFactory, InnerSearchableConfigurable> entry : mySubPanelFactories.entrySet()) {
      if (pageClass.isInstance(entry.getValue().createPanel().getSettingsPage())) {
        return entry.getValue();
      }
    }
    return null;
  }
public @Nullable SearchableConfigurable findSubConfigurable(@NotNull Class<?> pageClass)