I am using distinct from rxdart package but with the latest it is not available why ? also there is nothing which behaves like the distinct ? final stream = Stream.fromIterable([2, 6, 6, 8, 12, 8, 8, 2]).distinct(); stream.forEach(print); // Outputs events: 2,6,8,12,8,2. also disticntUnique is there but it doesn't behave like distinct?