*/
    @Nullable
    protected DisplayName getDeclaredDisplayName() {
        return null;
    }

    /**
     * Returns a display name for this provider, using a default if this is not known.
     */
    protected DisplayName getDisplayName() {
        DisplayName displayName = getDeclaredDisplayName();
        if (displayName == null) {
            return DEFAULT_DISPLAY_NAME;
        }

    @Override
    public void attachOwner(@Nullable ModelObject owner, DisplayName displayName) {
        this.displayName = displayName;
    }

    @Nullable
    @Override
    protected DisplayName getDeclaredDisplayName() {
        return displayName;
    }

    @Override
    protected DisplayName getTypedDisplayName() {
        return DEFAULT_DISPLAY_NAME;
    }

    @Override

        @Override
        protected Value<? extends T> calculateOwnValue(ValueConsumer consumer) {
            return Value.missing()
        }

        @Override
        protected DisplayName getDeclaredDisplayName() {
            return displayName
        }
    }

    static class Thing {}

    static abstract class PropertyCircularChainEvaluationSpec<T> extends CircularChainEvaluationSpec<T> {