Hi, This might be a silly question but I could not find an answer in the docs. I have a custom Sink (GraphStageLogic[SinkShape[T]]) which publishes to an event bus and runs for a predetermined duration. This works however there is no materialized value other than NotUsed since SinkShape only supports an Inlet. I want to get a Future[T] back so I can monitor the stream and react to success/failure. Is the best way to accomplish this to make my Sink into a Flow of FlowShape[T,T] then apply a Sink.ignore/fold to materialize a value?
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