code: @Override
  	public CPRuleAssetCategoryRel fetchByAssetCategoryId_First(
  		long assetCategoryId,
  		OrderByComparator<CPRuleAssetCategoryRel> orderByComparator) {
  		List<CPRuleAssetCategoryRel> list = findByAssetCategoryId(assetCategoryId,
  				0, 1, orderByComparator);
  
  		if (!list.isEmpty()) {
  			return list.get(0);
  		}
  
  		return null;
  	}
docs: Returns the first cp rule asset category rel in the ordered set where assetCategoryId = &#63;.
  
  @param assetCategoryId the asset category ID
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching cp rule asset category rel, or <code>null</code> if a matching cp rule asset category rel could not be found