ClassUpgradeCostOn this pageUpgradeCostclass UpgradeCostPropertiesenkacoinitemsconstructornew UpgradeCost(coinCost, costItems, enka)PARAMETERTYPEOPTIONALDEFAULTDESCRIPTIONcoinCostnumbercostItemsJsonObject[]enkaEnkaClientPropertiesenkaType: EnkaClientcoinType: numberitemsType: {material: Material, count: number}[]