how to use golang type alias for map

gistfile1.txt

package main

import (
	"fmt"
)

type TemplateCacheAlias map[string]int

func (t *TemplateCacheAlias) Get(name string) int {
	return (*t)[name]
}

func (t *TemplateCacheAlias) Set(name string, num int) error {
	(*t)[name] = num
	return nil
}

func main() {
	fmt.Println("Hello, playground")

	t := TemplateCacheAlias{}
	t.Set("something", 2)

	fmt.Printf("value : %d", t.Get("something"))
}