按引用返回的切片为空：

package main

import "fmt"

func GetItems(items *[]string) {
    list := make([]string, 0)
    list = append(list, "ok")
    items = &list
}

func main() {
    var items []string
    GetItems(&items)
    fmt.Print(len(items)) // expect 1 here, but got 0
}

如何通过引用从函数返回切片？