* @method array<Chat> getChats() The list of chats which the user must join to participate in the giveaway
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* @method int getWinnersSelectionDate() Point in time (Unix timestamp) when winners of the giveaway will be selected
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* @method int getWinnerCount() The number of users which are supposed to be selected as winners of the giveaway
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* @method bool getOnlyNewMembers() Optional. True, if only users who join the chats after the giveaway started should be eligible to win
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* @method bool getHasPublicWinners() Optional. True, if the list of giveaway winners will be visible to everyone
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* @method string getPrizeDescription() Optional. Description of additional giveaway prize
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* @method array<string> getCountryCodes() Optional. A list of two-letter ISO 3166-1 alpha-2 country codes indicating the countries from which eligible users for the giveaway must come. If empty, then all users can participate in the giveaway. Users with a phone number that was bought on Fragment can always participate in giveaways.
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* @method int getPremiumSubscriptionMonthCount() Optional. The number of months the Telegram Premium subscription won from the giveaway will be active for