How to implement wait/notify in BW 6.x

We are trying to migrate projects from BW 5.x to BW 6.x

5.x code has wait/notify pattern using the wait/notify activities.
Migration Document says ActiveMatrix BusinessWorks 6 Migration is Not Supported for this logic.
I have read the BW 6 documentation but it is not very clear. I have not seen any sample projects either for this logic

Can someone provide some help in implementing wait/notify in logic TIBCO BW 6.x. Step by step procedure with an example project would be highly appreciated.