static void Init()
    {
        AchievementEditor window = (AchievementEditor)EditorWindow.GetWindow <AchievementEditor>();

        window.Focus();
        window.minSize = new Vector2(700, 500);
    }
    public static void Init()
    {
        AchievementEditor ae = (AchievementEditor)EditorWindow.GetWindow(typeof(AchievementEditor));

        ae.Show();
    }