public Query andnot(QueryChain query) {
        query.setOp("andnot");
        queries.add(query);
        nonEmpty = nonEmpty || query.nonEmpty;
        return this;
    }
Andnot.
https://docs.vespa.ai/en/reference/query-language-reference.html#andnot

@param query the query
@return the query
client/src/main/java/ai/vespa/client/dsl/Query.java