DataLoader::getPreparedSelectFields

protected function getPreparedSelectFields()
{
	$result = [];
	$fields = $this->getSelectFields();
	if (!empty($fields) && is_array($fields))
	{
		foreach ($fields as $row)
		{
			if (empty($row) || !is_array($row) || empty($row['id']))
			{
				continue;
			}
			$result[] = $row['id'];
		}
		unset($row);
	}
	return $result;
}