Get the [ServerSocketReference].
WARNING: This feature is highly experimental and currently only
works on Linux. The API will be removed in Dart 1.10. Use the
shared
optional argument on the bind
method instead.
The returned [ServerSocketReference] can be used to create other [ServerSocket]s listening on the same port, using [ServerSocketReference.create]. Incoming connections on the port will be distributed fairly between the active server sockets. The [ServerSocketReference] can be distributed to other isolates through a [SendPort].