getComments method
Implementation
ValueStream<Comments?> getComments(Authorperm postId) {
final BehaviorSubject<Comments?> controller;
if (_commentsStreamControllers.containsKey(postId)) {
controller = _commentsStreamControllers[postId]!;
} else {
controller = BehaviorSubject<Comments?>();
_commentsStreamControllers[postId] = controller;
unawaited(_fetchAndAddComments(postId));
}
return controller;
}