fetchPollResponses method
Fetches poll response events from the server for fragmented timelines
where responses may not be in the current timeline chunk.
After fetching, the existing sync getPollResponses method will
return the correct data from timeline.aggregatedEvents.
Implementation
Future<void> fetchPollResponses(Timeline timeline) async {
assert(type == PollEventContent.startType);
await timeline.fetchAggregatedEvents(
eventId,
RelationshipTypes.reference,
);
}