public void PipeFrom(IReadable <IMessage> reader)
{
_fromReader = reader;
if (_fromReader.Reader.TryRegisterReaderHandler((msg) => msg.Accept(_msgVisitor), out int id))
{
void UnsubscribeFromReader()
{
_fromReader.Reader.TryUnregisterReaderHandler(id);
_fromReader.Dispose();
}
// unsubscribe the message handler, then dispose the from reader.
_unsubscriber.RegisterSubscription(UnsubscribeFromReader);
}
}
