Creates a Sink which writes incoming ByteStrings to an Stream created by the given function. Materializes a TaskTResult of IOResult that will be completed with the size of the file (in bytes) at the streams completion, and a possible exception if IO operation was not completed successfully. You can configure the default dispatcher for this Source by changing the "akka.stream.blocking-io-dispatcher" or set it for a given Source by using CreateDispatcher(String). If autoFlush is true the OutputStream will be flushed whenever a byte array is written, defaults to false. The Stream will be closed when the stream flowing into this SinkTIn, TMat is completed. The SinkTIn, TMat will cancel the stream when the Stream is no longer writable.

public static Sink<ByteString, Task<IOResult>> FromOutputStream(
	Func<Stream> createOutputStream,
	bool autoFlush = false
)

static member FromOutputStream : 
        createOutputStream : Func<Stream> * 
        ?autoFlush : bool 
(* Defaults:
        let _autoFlush = defaultArg autoFlush false
*)
-> Sink<ByteString, Task<IOResult>>