Go reflect. How to check whether reflect.Type is an error type?

I need to assuredly check whether a reflect.Type is an error.

There is no reflect kind for error. What is the formal/idiomatic manner to check for type error in go reflect?

Go Playground Full Example

//return map of default values, based on each return type of a function
// error  => err=nil
// bool   => true
// struct => new struct
func getDefaultValue(originalFunction interface{}) map[int]reflect.Value {
    defaultValues := make(map[int]reflect.Value)

    typeOfFunc := reflect.ValueOf(originalFunction).Type()

    numOut := typeOfFunc.NumOut() //number of function returns

    for i := 0; i < numOut; i++ {

        typeOut := typeOfFunc.Out(i) // type of return for index i
        switch typeOut.Kind() {

        case reflect.Bool:
            defaultValues[i] = reflect.ValueOf(true)

        case reflect.Struct:
            defaultValues[i] = reflect.New(typeOut()).Elem()

        // --> How to identify reflect.Type error assuredly, using switch or if...
        //case reflect.error: //don't exists
        //  var err error = nil
        //  defaultValues[i] = reflect.ValueOf(&err).Elem()

        default:
            //var err error = nil
            //defaultValues[i] = reflect.ValueOf(&err).Elem()
            fmt.Println("type of return index ", i, " was not identified")

        }

        fmt.Println("type of return index ", i, typeOut, "kind", typeOut.Kind(), "assign to err ", typeOut.AssignableTo(reflect.TypeOf(errors.New(""))))
    }

    return defaultValues
}