/SyncBFBean/getNotAcknowledgedEvents

Poll any not acknowledged events for the client system.
This method does not require, that the client system fills {@link SyncEventsRequestDTO#syncId}.
However, it requires, that a call to {@link #acknowledgeEvents(AcknowledgeEventsRequestDTO)} is done for acknowledge of the events.
Since XNSG 4.0, Nov. FP, 2017
.