code: public static CommerceOrderItem findByC_S_First(long commerceOrderId,
  		boolean subscription,
  		OrderByComparator<CommerceOrderItem> orderByComparator)
  		throws com.liferay.commerce.exception.NoSuchOrderItemException {
  		return getPersistence()
  				   .findByC_S_First(commerceOrderId, subscription,
  			orderByComparator);
  	}
docs: Returns the first commerce order item in the ordered set where commerceOrderId = &#63; and subscription = &#63;.
  
  @param commerceOrderId the commerce order ID
  @param subscription the subscription
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching commerce order item
  @throws NoSuchOrderItemException if a matching commerce order item could not be found