mozilla-services/android-sync — comment on commit 91987cdd058fcf3752869871022f712e19a0490b
File: src/main/java/org/mozilla/gecko/sync/repositories/android/ClientsDatabaseContentProvider.java line 72
By marina-samuel:

What about an immutable`Set`? I don't think there's a need for the String in `Map` but Iterator doesn't have a size() method which I'm using in the tests.