执行：检查值的类型是否为函数

How I can check that some variable in golang has type func, like this:

func A() {}

func main() {
    variable := A
    isFunc := IsFunc(variable) // true or false
}

func IsFunc(v interface{}) bool {
   return reflect.TypeOf(v).Kind() == reflect.Func
}

Already solved with this:

func IsFunc(fn interface{}) bool {
    return reflect.TypeOf(fn).Kind() == reflect.Func
}