Remove up to the specified maxNumItems from the back of this queue. Optionally specify a buffer into which the items removed from the queue are loaded. If buffer is non-null, the removed items are appended to it as if by repeated application of buffer->push_back(popBack()) while the queue is not empty and maxNumItems have not yet been removed. This method never blocks. The behavior is undefined unless maxNumItems >= 0. Note that the ordering of the items in *buffer after the call is the reverse of the ordering they had in the queue.
Declared in <bdlcc_queue.h>
void
tryPopBack(int maxNumItems);