.filter(Expression::isLiteralStringValueExpr)
                    .map(Expression::asLiteralStringValueExpr)
                    .map(LiteralStringValueExpr::getValue)
                    .orElse(null);
                getCurrentClass().getConstants().put(constName, value);
            });
        }
    }

    private TypeMetaData extractTypeName(Type type) {

        return calculateOwnValue(ValueConsumer.IgnoreUnsafeRead).orElse(Cast.uncheckedNonnullCast(defaultValue));
    }

    @Override
    public Value<? extends T> calculateValue(ValueConsumer consumer) {
        return calculateOwnValue(consumer).pushWhenMissing(getDeclaredDisplayName());
    }

    @Override
    public Provider<T> orElse(T value) {
        return new OrElseFixedValueProvider<>(this, value);
    }

    }

    @Override
    public boolean calculatePresence(ValueConsumer consumer) {
        return true;
    }

    @Override
    public Provider<T> orElse(T value) {
        return this;
    }

    @Override
    public Provider<T> orElse(Provider<? extends T> provider) {
        return this;
    }