【Unity】「Unity Excel Importer Maker」を使ってExcelからScriptableObjectに変換する

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Entity_Monsters : ScriptableObject
{	
	public List<Sheet> sheets = new List<Sheet> ();

	[System.SerializableAttribute]
	public class Sheet
	{
		public string name = string.Empty;
		public List<Param> list = new List<Param>();
	}

	[System.SerializableAttribute]
	public class Param
	{
		
		public double id;
		public string name_ja;
		public string name_en;
		public double hp;
		public double ap;
		public double dp;
		public double sp;
		public string png_name;
	}
}

    [SerializeField] private Entity_Monsters monsters;

・・・略・・・

    for (var i = 0; i < monsters.sheets.Count; i++)
    {
        for (var j = 0; j <  monsters.sheets[i].list.Count; j++)
        {
            var param = monsters.sheets[i].list[j];
            Debug.Log($"sheets: {i} param {j} id: {param.id} name: {param.name_ja}");
        }
    }

using UnityEngine;
public class MonsterRepository : MonoBehaviour
{
    [SerializeField] private Entity_Monsters monsters;
    /// <summary>
    /// 指定IDのMonsterParamを返却
    /// </summary>
    public Entity_Monsters.Param GetMonsterParam(double id)
    {
        var param = monsters.sheets[0].list.Find(monster => monster.id == id);
        if (param == null) Debug.LogError("not found monster!! id: " + id);
        return param;
    }
}