class EventQueryParams extends DataQueryParams {

    public List<QueryItem> getDuplicateQueryItems()
    {
        Set<QueryItem> dims = new HashSet<>();
        List<QueryItem> duplicates = new ArrayList<>();

        for ( QueryItem dim : items )
        {
            if ( !dims.add( dim ) )
            {
                duplicates.add( dim );
            }
        }

        return duplicates;
    }

    private  EventQueryParams();

}