}
	return http2goroutineLock(http2curGoroutineID())
}

func (g http2goroutineLock) check() {
	if !http2DebugGoroutines {
		return
	}
	if http2curGoroutineID() != uint64(g) {
		panic("running on the wrong goroutine")
	}
}

func (g http2goroutineLock) checkNotOn() {
	if !http2DebugGoroutines {
		return
	}
	if http2curGoroutineID() == uint64(g) {