You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cipher_suite.go
    path of file: ./repos/quic-go/internal/qtls
    
    the code of the file until where you have to start completion: package qtls

import (
	"crypto/tls"
	"fmt"
	"unsafe"
)

//go:linkname cipherSuitesTLS13 crypto/tls.cipherSuitesTLS13
var cipherSuitesTLS13 []unsafe.Pointer

//go:linkname defaultCipherSuitesTLS13 crypto/tls.defaultCipherSuitesTLS13
var defaultCipherSuitesTLS13 []uint16

//go:linkname defaultCipherSuitesTLS13NoAES crypto/tls.defaultCipherSuitesTLS13NoAES
var defaultCipherSuitesTLS13NoAES []uint16

var cipherSuitesModified bool

// SetCipherSuite modifies the cipherSuiteTLS13 slice of cipher suites inside qtls
// such that it only contains the cipher suite with the chosen id.
// The reset function returned resets them back to the original value.
func SetCipherSuite(id uint16) (reset func()) {
	if cipherSuitesMod
    
func SetCipherSuite(id uint16) (reset func()) {
	if cipherSuitesModified {
		panic("cipher suites modified multiple times without resetting")
	}
	cipherSuitesModified = true

	origCipherSuitesTLS13 := append([]unsafe.Pointer{}, cipherSuitesTLS13...)
	origDefaultCipherSuitesTLS13 := append([]uint16{}, defaultCipherSuitesTLS13...)
	origDefaultCipherSuitesTLS13NoAES := append([]uint16{}, defaultCipherSuitesTLS13NoAES...)
	// The order is given by the order of the slice elements in cipherSuitesTLS13 in qtls.
	switch id {
	case tls.TLS_AES_128_GCM_SHA256:
		cipherSuitesTLS13 = cipherSuitesTLS13[:1]
	case tls.TLS_CHACHA20_POLY1305_SHA256:
		cipherSuitesTLS13 = cipherSuitesTLS13[1:2]
	case tls.TLS_AES_256_GCM_SHA384:
		cipherSuitesTLS13 = cipherSuitesTLS13[2:]
	default:
		panic(fmt.Sprintf("unexpected cipher suite: %d", id))
	}
	defaultCipherSuitesTLS13 = []uint16{id}
	defaultCipherSuitesTLS13NoAES = []uint16{id}

	return func() {
		cipherSuitesTLS13 = origCipherSuitesTLS13
		defaultCipherSuitesTLS13 = origDefaultCipherSuitesTLS13
		defaultCipherSuitesTLS13NoAES = origDefaultCipherSuitesTLS13NoAES
		cipherSuitesModified = false
	}
}