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;