@SuppressWarnings("unchecked")
    public Q setFlushMode(FlushMode flushMode) {
        this.flushMode = flushMode;
        return (Q) this;
    }
Override the current session flush mode, just for this query.
@return the current object
querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/AbstractHibernateQuery.java