src/main/java/org/criteria4jpa/criterion/NotExpression.java
public String toQueryString(Criteria criteria, CriteriaQueryBuilder queryBuilder) {
    return "NOT "+criterion.toQueryString(criteria, queryBuilder);
  }
public String toQueryString(Criteria criteria, CriteriaQueryBuilder queryBuilder) {
    return "NOT "+criterion.toQueryString(criteria, queryBuilder);
  }
/*
@see org.criteria4jpa.criterion.Criterion#toQueryString(org.criteria4jpa.Criteria, org.criteria4jpa.impl.CriteriaQueryBuilder)