PollAnswer constructor
      const
      PollAnswer({})
     
    
Constructs a PollAnswer object
Implementation
const factory PollAnswer({
  /// Unique poll identifier
  @JsonKey(name: 'poll_id') required String pollId,
  /// The user, who changed the answer to the poll
  @JsonKey(name: 'user') User? user,
  /// 0-based identifiers of answer options, chosen by the user. May be empty
  /// if the user retracted their vote.
  @JsonKey(name: 'option_ids') required List<int> optionIds,
  /// Optional. The chat that changed the answer to the poll, if the voter is
  /// anonymous
  @JsonKey(name: 'voter_chat') Chat? voterChat,
}) = _PollAnswer;