golang-cache是全局吗

package main

import (
        "log"
        "time"

        "github.com/patrickmn/go-cache"
)


func main(){

        c := cache.New(30*time.Second, 10*time.Second)


        c.Set("Title", "Spring Festival", cache.DefaultExpiration)


        value, found := c.Get("Title")
        if found {
                log.Println("found:", value)
        } else {
                log.Println("not found")
        }


        time.Sleep(60*time.Second)
        log.Println("sleep 60s...")
        value, found = c.Get("Title")
        if found {
                log.Println("found:", value)
        } else {
                log.Println("not found")
        }

}

2019/02/05 17:49:32 found: Spring Festival
2019/02/05 17:50:32 sleep 60s…
2019/02/05 17:50:32 not found