const net/http/internal/http2.ClientPreface

3 uses

	net/http/internal/http2 (current package)
		http2.go#L67: 	ClientPreface = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
		http2.go#L86: 	clientPreface = []byte(ClientPreface)
		server.go#L972: 		buf := make([]byte, len(ClientPreface))