represents::getStage

static function getStage(int $entityId, string $workflowCode): ?string
{
	$stage = '';
	$queryParams = [
		'select' => ['ID', 'STAGE'],
		'filter' => ['=ENTITY_ID' => $entityId, '=WORKFLOW_CODE' => $workflowCode],
		'order' => ['ID' => 'DESC'],
	];

	$row = static::getList($queryParams)->fetch();
	if ($row)
	{
		$stage = (string)$row['STAGE'];
	}

	return $stage !== '' ? $stage : null;
}