code: public static OutputStream get(IO.Writable io) {
  		if (io instanceof IOFromOutputStream)
  			return ((IOFromOutputStream)io).getOutputStream();
  		if (io instanceof IO.WritableByteStream)
  			return new ByteStream((IO.WritableByteStream)io);
  		return new Writable(io);
  	}
docs: Create an OutputStream based on the given writable IO.