garden_client/Assets/Script/Extension/ExtensionUnityAction.cs

using UnityEngine;
using UnityEngine.Events;

using System.Collections;

public static class ExtensionUnityAction
{
    public static void SafeInvoke(this UnityAction action)
    {
        if (action != null)
        {
            action.Invoke();
        }
    }

    public static void SafeInvoke<T>(this UnityAction<T> action, T t)
    {
        if (action != null)
        {
            action.Invoke(t);
        }
    }
}