@Override
  public @Nullable Configurable createConfigurable() {
    final List<Configurable> availableConfigurables = getAvailableConfigurables();
    return availableConfigurables.size() == 1
           ? new EmmetCompositeConfigurable(ContainerUtil.getFirstItem(availableConfigurables))
           : new EmmetCompositeConfigurable(availableConfigurables);
  }
@Override
  public @Nullable Configurable createConfigurable()