#vulnerable code 
                                @Override
    @JsonIgnore
    public Set<Aggregation> getAggregations() {
        return getInnerQuery().getAggregations();
    } 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    @JsonIgnore
    public Set<Aggregation> getAggregations() {
        return getInnerQueryUnchecked().getAggregations();
    }