public FixedQuery groupingSessionCache(boolean enable) {
        this.param("groupingSessionCache", enable);
        return this;
    }
FixedQuery contains a 'Query'.
This object holds vespa or user defined parameters
https://docs.vespa.ai/en/reference/query-api-reference.html
client/src/main/java/ai/vespa/client/dsl/FixedQuery.java