src/main/java/org/criteria4jpa/projection/PathProjection.java
public String toGroupByString(Criteria criteria, CriteriaQueryBuilder queryBuilder) {
    if(grouped) {
      if(absolute) {
        return path;
      } else {
        return queryBuilder.getAbsolutePath(criteria, path);
      }
    }
    return null;
  }
public String toGroupByString(Criteria criteria, CriteriaQueryBuilder queryBuilder) {
    if(grouped) {
      if(absolute) {
        return path;
      } else {
        return queryBuilder.getAbsolutePath(criteria, path);
      }
    }
    return null;
  }
/*
@see org.criteria4jpa.projection.Projection#toGroupByString(org.criteria4jpa.Criteria, org.criteria4jpa.impl.CriteriaQueryBuilder)