public override Boolean Equals(ANotification other) => SortKey.Equals(other.SortKey);
public override Boolean OptionalEquals(ANotification other) => other is HTTPSNotification httpsNotification &&
public override Int32 CompareTo(ANotification other) => SortKey.CompareTo(other.SortKey);
public override Boolean OptionalEquals(ANotification other) => other is EMailNotification eMailNotification &&
public override Boolean OptionalEquals(ANotification other) => other is TelegramGroupNotification TelegramGroupNotification &&
public abstract Boolean Equals(ANotification other);
public abstract Int32 CompareTo(ANotification other);
public override Boolean OptionalEquals(ANotification other) => other is SMSNotification smsNotification &&