class NotFilter extends AbstractFilter {

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        NotFilter notFilter = (NotFilter) o;

        if (filter != null ? !filter.equals(notFilter.filter) : notFilter.filter != null) return false;

        return true;
    }

    public  NotFilter(Filter filter);

}