@Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof HttpQueryParams)) {
            return false;
        }

        HttpQueryParams hqp2 = (HttpQueryParams) obj;
        return Iterables.elementsEqual(delegate.entries(), hqp2.delegate.entries());
    }
Replace any/all entries with this key, with this single entry.
zuul-core/src/main/java/com/netflix/zuul/message/http/HttpQueryParams.java