UseCustomEasingSet.cs

using UnityEngine;
using System.Collections;
using DG.Tweening;

public class UseCustomEasingSet : MonoBehaviour 
{
    [SerializeField]
    private CustomEaisingSet _easingSet;

    void Start () {
        transform.DOLocalMoveX(2f, 3f).SetEase(_easingSet.easing1);
    }
}