Code snippet from MultipleSelectionModelBase.java, function public void clearSelection() , line 630:

            List<Integer> removed = new AbstractList<Integer>() {
                final BitSet clone = (BitSet) selectedIndices.clone();

                @Override public Integer get(int index) {
                    return clone.nextSetBit(index);
                }

                @Override public int size() {
                    return clone.cardinality();
                }
            };

Suppose indices 2 and 3 were selected before the call.
The removed list as implemented above will look like [2, 2] instead of [2, 3] which should be obvious from the code.

Why not use createListFromBitSet(...) as in clearAndSelect() ?