[Unity] RollDice, Action <T> callback

using System;

    void RollDice(RollDiceCmd rollDice)
    {
        int result = UnityEngine.Random.Range(1, 4);
        float length = animatorController.animationClips[result - 1].length;
        StartCoroutine(WaitToEndAnimation(result, length, (outcame) =>
                {
                    rollDice.Result = outcame;
                    Mediator.Instance.Publish<RollDiceCmd>(rollDice);
                    Debug.Log("Your result " + rollDice.Result);
                    StopAllCoroutines();
                    animator.SetInteger("result", 0);
                }));
    }

    IEnumerator WaitToEndAnimation(int result , float length,Action<int> callback)
    {
        animator.SetInteger("result", result);
        yield return new WaitForSeconds(length + 1);
        callback(result);
        yield return null;
    }