func http2isNoCachedConnError(err error) bool {
	_, ok := err.(interface{ IsHTTP2NoCachedConnError() })
	return ok
}

type http2Server struct {
	NewWriteScheduler func() http2WriteScheduler
}

type http2WriteScheduler any

func http2NewPriorityWriteScheduler(any) http2WriteScheduler { panic(noHTTP2) }

	// be larger than 2^32-1. If the value is zero or larger than the
	// maximum, a default value will be used instead.
	MaxUploadBufferPerStream int32

	// NewWriteScheduler constructs a write scheduler for a connection.
	// If nil, a default scheduler is chosen.
	NewWriteScheduler func() http2WriteScheduler

	// CountError, if non-nil, is called on HTTP/2 server errors.
	// It's intended to increment a metric for monitoring, such