public AllRankingData( AllRankingData other )
 {
     this.easyData = other.easyData;
     this.normalData = other.normalData;
     this.hardData = other.hardData;
     this.hellData = other.hellData;
     this.extraData = other.extraData;
 }
 private void InitializeDefault()
 {
     var defaultData = (Resources.Load( "DefaultRankingData" ) as GameObject).GetComponent<DefaultRankingData>();
     DataList = new AllRankingData( defaultData.AllRankingData );
 }