private boolean isTypeOf(@Nullable E element, @NotNull ArrangementSettingsToken token) {
      if (element instanceof TypeAwareArrangementEntry) {
        Set<? extends ArrangementSettingsToken> types = ((TypeAwareArrangementEntry)element).getTypes();
        return types.size() == 1 && token.equals(types.iterator().next());
      }
      return false;
    }
private boolean isTypeOf(@Nullable E element, @NotNull ArrangementSettingsToken token)