Form::getFieldSet

static function getFieldSet(int $entityTypeId, ?int $presetId = null): ?Crm\FieldSet\Item
{
	$factory = new Crm\FieldSet\Factory;
	$code = 'def-req-' . $entityTypeId . ($presetId ? '-' . $presetId : '');
	$item = $factory->getItemByCode($code);
	if ($item)
	{
		return $item;
	}

	$factory->installDefaults($presetId);
	return $factory->getItemByCode($code);
}