title: How to transform Bytestring to Source[Bytestring, Any]
body: <p>I'm receiving a file as a Bytestring from Kafka Reactive Streams consumer; I want to construct an akka-http request with this Bytestring as an entity HttpEntity.Default. HttpEntity.Default requires Source[Bytestring, Any] as one of its parameters.</p>
  
  <p>What is a best way to connect the two?</p>