Is there a way to restrict the number of users in a queue. 

Hi Guys, 

Has anyone tried Cybersource silent order API integration with Salesforce? Looking for some help.
Thanks in advance.

Thanks,
Prashant.

I added the below lines of code for upsert operation to record the duplicate record set.But I face compile time error .Please note that the dmloptions work for database.insert and database.update.Please help
Lines of Code:
Database.DMLOptions dml1 = new Database.DMLOptions();
  dml1.DuplicateRuleHeader.AllowSave = true;
  Database.upsert(lstOfEqup1, dml1);

Error message :
Method does not exist or incorrect signature: void upsert(List<Account>, Database.DMLOptions) from the type Database  
 

Is there a way to restrict the number of users in a queue.