public MessageGiveawayWinners (
int64 boosted_chat_id,
int64 giveaway_message_id,
int32 additional_chat_count,
int32 actual_winners_selection_date,
bool only_new_members,
bool was_refunded,
GiveawayPrize prize,
string prize_description,
int32 winner_count,
ArrayList<
int64?> winner_user_ids,
int32 unclaimed_prize_count)