code: public static CommerceAvailabilityEstimate findByGroupId_First(
  		long groupId,
  		OrderByComparator<CommerceAvailabilityEstimate> orderByComparator)
  		throws com.liferay.commerce.exception.NoSuchAvailabilityEstimateException {
  		return getPersistence().findByGroupId_First(groupId, orderByComparator);
  	}
docs: Returns the first commerce availability estimate in the ordered set where groupId = &#63;.
  
  @param groupId the group ID
  @param orderByComparator the comparator to order the set by (optionally <code>null</code>)
  @return the first matching commerce availability estimate
  @throws NoSuchAvailabilityEstimateException if a matching commerce availability estimate could not be found