public Collection<EventBean> getCollection(int column, ExprEvaluatorContext context) {
if (column < aggregators.length) {
return null;
}
else {
AggregationAccessorSlotPair pair = accessorsFactory[column - aggregators.length];
return pair.getAccessor().getEnumerableEvents(currentAggregatorRow.getStates()[pair.getSlot()]);
}
}