@NonNull
    public Collection<Integer> getActiveIndexes() {
        Collection<Integer> result = new HashSet<>();
        for (AtomicInteger i : mActiveIndexes) {
            result.add(i.get());
        }
        return result;
    }
@NonNull
    public Collection<Integer> getActiveIndexes() {
        Collection<Integer> result = new HashSet<>();
        for (AtomicInteger i : mActiveIndexes) {
            result.add(i.get());
        }
        return result;
    }
@ NonNull public Collection < Integer > getActiveIndexes ( ) { Collection < Integer > result = new HashSet <> ( ) ; for ( AtomicInteger i : mActiveIndexes ) { result . add ( i . get ( ) ) ; } return result ; }
Returns a collection of currently active indexes.
Returns a collection of currently active indexes .