return DEFAULT_DISPLAY_NAME;
    }

    protected abstract ValueSupplier.Value<? extends T> calculateOwnValue(ValueConsumer consumer);

    protected Value<? extends T> calculateOwnPresentValue() {
        Value<? extends T> value = calculateOwnValue(ValueConsumer.IgnoreUnsafeRead);
        if (value.isMissing()) {
            throw new MissingValueException(cannotQueryValueOf(value));
        }

    public void appendAll(Provider<? extends Iterable<? extends T>> provider) {
        withActualValue(it -> it.addAll(provider));
    }

    @Override
    public int size() {
        return calculateOwnPresentValue().getWithoutSideEffect().size();
    }

    /**
     * Adds the given supplier as the new root supplier for this collection.
     *
     * @param collector the collector to add