Dynamic::getStage

public function getStage($placeholder): ?string
{
	$statusId = $this->data[$placeholder . '_ID'];
	if (empty($statusId))
	{
		return null;
	}
	$factory = $this->getFactory();
	if ($factory)
	{
		$stage = $factory->getStage($statusId);
		if ($stage)
		{
			return $stage->getName();
		}
	}

	return null;
}