#fixed code
                                @Override
    public LookbackQuery withAggregations(Collection<Aggregation> aggregations) {
        return withDataSource(new QueryDataSource(getInnerQueryUnchecked().withAggregations(aggregations)));
    }
#vulnerable code 
                                @Override
    public LookbackQuery withAggregations(Collection<Aggregation> aggregations) {
        return withDataSource(new QueryDataSource(getInnerQuery().withAggregations(aggregations)));
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE