Dimension migration for Dynamics AX

Hello everyone,

I'm doing a test code upgrade to Dynamics AX and I ran into a form that uses segmented entry controls and DimensionDynamicAccountController class. I found a migration guide for this job but there's one last part that is unclear and not mentioned in the guide. How should I migrate this code part in forms' init method:

dimAccountController.parmDimensionAccountStorageUsage(DimensionAccountStorageUsage::Transactional);

What I'm thinking of doing is using a parmDimensionAccountStorageUsageType method on segmented entry control, like that:

LedgerJournalTrans_AccountNum.parmDimensionAccountStorageUsageType(DimensionAccountStorageUsage::Transactional);

Now, here I have a problem. Since DimensionAccountStorageUsage enumeration has changed values to "Alias" and "NonAlias", which enumeration should I choose and what do they mean?

Thank you for your help in advance!