func (rb *reorderBuffer) setFlusher(out []byte, f func(*reorderBuffer) bool) {
	rb.out = out
	rb.flushF = f
}

// reset discards all characters from the buffer.
func (rb *reorderBuffer) reset() {
	rb.nrune = 0
	rb.nbyte = 0
}

func (rb *reorderBuffer) doFlush() bool {
	if rb.f.composing {
		rb.compose()
	}
	res := rb.flushF(rb)
	rb.reset()
	return res
}

	ft := formTable[f]
	n, ok := ft.quickSpan(src, 0, len(b), true)
	if ok {
		return b
	}
	out := make([]byte, n, len(b))
	copy(out, b[0:n])
	rb := reorderBuffer{f: *ft, src: src, nsrc: len(b), out: out, flushF: appendFlush}
	return doAppendInner(&rb, n)
}

// String returns f(s).
func (f Form) String(s string) string {
	src := inputString(s)
	ft := formTable[f]
	n, ok := ft.quickSpan(src, 0, len(s), true)
	if ok {

        10_000 * listener.onOutput(_)
    }

    def "background flush does nothing when events already flushed"() {
        def event1 = event('1')
        def event2 = event('2')
        def flush = new FlushOutputEvent()

        given:
        renderer.onOutput(event1)
        renderer.onOutput(event2)
        renderer.onOutput(flush)

        when:
        executor.runFixedScheduledActionsNow()

}

type rwUnwrapper interface {
	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()

	if rw.HeaderMap == nil {
		rw.HeaderMap = make(http.Header)
	}
	rw.snapHeader = rw.HeaderMap.Clone()
}

// Flush implements [http.Flusher]. To test whether Flush was
// called, see rw.Flushed.
func (rw *ResponseRecorder) Flush() {
	if !rw.wroteHeader {
		rw.WriteHeader(200)
	}
	rw.Flushed = true
}

// Result returns the response generated by the handler.
//

	n, z.err = z.compressor.Write(p)
	return n, z.err
}

// Flush flushes any pending compressed data to the underlying writer.
//
// It is useful mainly in compressed network protocols, to ensure that
// a remote reader has enough data to reconstruct a packet. Flush does
// not return until the data has been written. If the underlying
// writer returns an error, Flush returns that error.
//

	start := uintptr(unsafe.Pointer(&b.buf[0]))
	b.next = start
	if testSmallBuf {
		// For testing, make the buffer smaller but more than
		// 1 write barrier's worth, so it tests both the
		// immediate flush and delayed flush cases.
		b.end = uintptr(unsafe.Pointer(&b.buf[wbMaxEntriesPerCall+1]))
	} else {
		b.end = start + uintptr(len(b.buf))*unsafe.Sizeof(b.buf[0])
	}

	if (b.end-b.next)%unsafe.Sizeof(b.buf[0]) != 0 {

    Writer writer = new AppendableWriter(spy);

    writer.write("Hello");
    assertFalse(spy.flushed);
    assertFalse(spy.closed);

    writer.flush();
    assertTrue(spy.flushed);
    assertFalse(spy.closed);

    writer.close();
    assertTrue(spy.flushed);
    assertTrue(spy.closed);
  }

  public void testCloseIsFinal() throws IOException {

			if err != nil {
				return
			}
			if len(mergeCh) == 0 {
				// Flush if nothing is queued
				w.(http.Flusher).Flush()
			}
			grid.PutByteBuffer(ev)
		case <-emptyEventTicker:
			if err := enc.Encode(struct{ Records []event.Event }{}); err != nil {
				return
			}
			w.(http.Flusher).Flush()
		case <-keepAliveTicker:
			if _, err := w.Write([]byte(" ")); err != nil {
				return
			}

	}
	// Clear tinyalloc pool.
	c.tiny = 0
	c.tinyoffset = 0

	// Flush tinyAllocs.
	stats := memstats.heapStats.acquire()
	atomic.Xadd64(&stats.tinyAllocCount, int64(c.tinyAllocs))
	c.tinyAllocs = 0
	memstats.heapStats.release()

	// Update heapLive and heapScan.
	gcController.update(dHeapLive, scanAlloc)
}

// prepareForSweep flushes c if the system has entered a new sweep phase