/// <summary>
/// 各行動の実処理関数
/// </summary>
/// <param name="states">現在のゲーム状態</param>
/// <param name="happened">行動内容</param>
/// <returns>行動結果を反映したゲーム状態</returns>
public static GameStates ProcessActually(this GameStates states, Happened happened)
{
var result = happened.Predicate(states);
result.AddHappenedLog(happened);
return(result);
}