public static void AssertReferralLevelIsAppropriateForReward(this ReferralProgramSlot slot, int level, UserNote userNote) { }
public static void AssertRewardWasNotClaimedBefore(this ReferralProgramSlot slot, int level) { }
public static List <int> GetNotClaimedLevels(this ReferralProgramSlot slot) => default;
public static bool RewardWasClaimedBefore(this ReferralProgramSlot slot, int level) => default;
public static bool ReferralLevelIsAppropriateForReward(this ReferralProgramSlot slot, int level, UserNote userNote) => default;