code: public static CommercePriceListUserSegmentEntryRel findByCommercePriceListId_First(
  		long commercePriceListId,
  		OrderByComparator<CommercePriceListUserSegmentEntryRel> orderByComparator)
  		throws com.liferay.commerce.price.list.exception.NoSuchPriceListUserSegmentEntryRelException {
  		return getPersistence()
  				   .findByCommercePriceListId_First(commercePriceListId,
  			orderByComparator);
  	}
docs: Returns the first commerce price list user segment entry rel in the ordered set where commercePriceListId = &#63;.
  
  @param commercePriceListId the commerce price list ID
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching commerce price list user segment entry rel
  @throws NoSuchPriceListUserSegmentEntryRelException if a matching commerce price list user segment entry rel could not be found