syncAll
Syncs the provided Exchange until they are all done communicating. The syncAll operator creates some pairs of Exchange, forming a fully connected graph.
Because a fully connected graph is created, some Exchange may transitively sync messages, event if their direct connections are stopped. The degenerate case of this topology is a single exchange, which will not sync at all.
Parameters
I
the type of the incoming messages.
O
the type of the outgoing messages.