@Override
        public boolean equals(Object other) {
            if ( ! super.equals(other)) return false;
            if ( ! Objects.equals(this.value, ((Entry)other).value)) return false;
            return true;
        }
A unique entry in a predicate item. This is immutable.
container-search/src/main/java/com/yahoo/prelude/query/PredicateQueryItem.java