create Ledger dimension from value && get value(cust) from dimension

ledgerJournalTransUpdate.OffsetLedgerDimension = LedgerDynamicAccountHelper::getDynamicAccountFromAccountNumber(BankAccount.valueStr(),LedgerJournalACType::Bank);

To retrive cutomer value :

LedgerDynamicAccountHelper::getAccountNumberFromDynamicAccount(ledgerJournalTrans.LedgerDimension);