Retrieve a list of polls

Create a PollListQuery instance to retrieve a list of polls matching the specifications set by PollListQueryParams. After a list of polls is successfully retrieved, you can access the data of each polls from the result list through the polls parameter of the callback handler.

try {
  final query = await PollListQuery(
    PollListQueryParams(
      channelType: channel.channelType,
      channelUrl: channel.channelUrl,
    ),
  );
  final polls = await query.next();
} catch (e) {
  // Handle error.
}