@SuppressWarnings("unchecked")
    public Q setFetchSize(int fetchSize) {
        this.fetchSize = fetchSize;
        return (Q) this;
    }
Set a fetchJoin size for the underlying JDBC query.
@param fetchSize the fetchJoin size
querydsl-jpa/src/main/java/com/querydsl/jpa/hibernate/sql/AbstractHibernateSQLQuery.java