why me get Chrome header have "" ？

[xiaxichen]

`package main

import ( browser "github.com/eddycjy/fake-useragent" "log" )

func main() { random := browser.Random() log.Printf("Random: %s", random) chrome := browser.Chrome() log.Printf("Chrome: %s", chrome) } out put GOROOT=/usr/local/go #gosetup GOPATH=/Users/xiaxichen/go #gosetup /usr/local/go/bin/go build -o /private/var/folders/qk/tgc9vq6j6lbgwlsxgb4lyyd40000gn/T/___go_build_main_go /Users/xiaxichen/goDistributedSpider/crawl/main.go #gosetup /private/var/folders/qk/tgc9vq6j6lbgwlsxgb4lyyd40000gn/T/___go_build_main_go

2020/10/10 15:19:19 Random: Mozilla/5.0 (Linux; Android 6.0; MotoG3 Build/MPIS24.65-33.1-2-16) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.91 Mobile Safari/537.36 2020/10/10 15:19:19 Chrome:

`