pageSubscriptions abstract method
Start paging through subscriptions.
If topic is passed this will list all subscriptions to that topic.
Otherwise this will list all subscriptions.
The maximum number of subscriptions in each page is specified in
pageSize
Returns a Future which completes with a Page object holding the
first page. Use the Page object to move to the next page of
subscriptions.
Implementation
Future<Page<Subscription>> pageSubscriptions(
{String topic, int pageSize = 50});