protected function projectObject(ObjectInterface $object)
    {
        foreach ($this->getStaticFieldValues($object) as $value) {
            yield $value;
        }

        foreach ($this->getAttributeKeysAndControllers() as list($attributeKey, $attributeController)) {
            /* @var \Concrete\Core\Attribute\AttributeKeyInterface $attributeKey */
            /* @var \Concrete\Core\Attribute\Controller $attributeController */
            $value = $object->getAttributeValueObject($attributeKey, false);
            $attributeController->setAttributeValue($value);
            if ($attributeController instanceof SimpleTextExportableAttributeInterface) {
                yield $attributeController->getAttributeValueTextRepresentation();
            } elseif ($attributeController instanceof MulticolumnTextExportableAttributeInterface) {
                foreach ($attributeController->getAttributeValueTextRepresentation() as $part) {
                    yield $part;
                }
            }
        }
    }