public static BlackMarketItem AddCharmData(this BlackMarketItem item, ForgeCharmProbabilities probabilities) => default;
 public static bool IsPowerUpStone(this BlackMarketItem item) => default;
 public static BlackMarketItem AddEffectData(this BlackMarketItem item, UserEffectTypeId typeId, double power, TimeSpan duration) => default;
 public static BlackMarketItem AddMasteryPointsData(this BlackMarketItem item, MasteryPointType type) => default;
 public static BlackMarketItem AddPowerUpItemData(this BlackMarketItem item, ArtifactRankId rankId, StatKindId statId, bool isAbsolute, double minValue, double maxValue, double step, Account.Resources usePrice, Account.Resources sellPrice) => default;
 public static BlackMarketItem AddRandomPowerUpItemData(this BlackMarketItem item, ArtifactRankId rankId) => default;
 public static BlackMarketItem AddHeroLevelUpItemData(this BlackMarketItem item, Element element, int xp, int correctElementXp, Account.Resources price) => default;
 public static BlackMarketItem AddHeroRankUpItemData(this BlackMarketItem item, HeroGrade grade) => default;
 public static BlackMarketItem AddSkillUpgradeData(this BlackMarketItem item, params HeroRarity[] rarities) => default;
 public static BlackMarketItem AddUpdateUserData(this BlackMarketItem item, UpdateUserType type) => default;
 public static BlackMarketItem AddShardData(this BlackMarketItem item, ShardTypeId typeId) => default;
 public static BlackMarketItem AddResourcesData(this BlackMarketItem item, bool maxEnergy = false, bool maxTokens = false, bool maxArena3X3Tokens = false) => default;
 public static BlackMarketItem AddPrice(this BlackMarketItem item, Account.Resources price) => default;