Unwrap() ResponseWriter
}

// Flush flushes buffered data to the client.
func (c *ResponseController) Flush() error {
	rw := c.rw
	for {
		switch t := rw.(type) {
		case interface{ FlushError() error }:
			return t.FlushError()
		case Flusher:
			t.Flush()
			return nil
		case rwUnwrapper:
			rw = t.Unwrap()
		default:
			return errNotSupported()
		}
	}
}

}

func (w *response) closedRequestBodyEarly() bool {
	body, ok := w.req.Body.(*body)
	return ok && body.didEarlyClose()
}

func (w *response) Flush() {
	w.FlushError()
}

func (w *response) FlushError() error {
	if !w.wroteHeader {
		w.WriteHeader(StatusOK)
	}
	err := w.w.Flush()
	e2 := w.cw.flush()
	if err == nil {
		err = e2
	}
	return err
}

		} else {
			st.writeDeadline.Reset(deadline.Sub(sc.srv.now()))
		}
	})
	return nil
}

func (w *http2responseWriter) Flush() {
	w.FlushError()
}

func (w *http2responseWriter) FlushError() error {
	rws := w.rws
	if rws == nil {
		panic("Header called after Handler finished")
	}
	var err error
	if rws.bw.Buffered() > 0 {
		err = rws.bw.Flush()