code: public static CommerceOrderItem findByC_ERC(long companyId,
  		String externalReferenceCode)
  		throws com.liferay.commerce.exception.NoSuchOrderItemException {
  		return getPersistence().findByC_ERC(companyId, externalReferenceCode);
  	}
docs: Returns the commerce order item where companyId = &#63; and externalReferenceCode = &#63; or throws a {@link NoSuchOrderItemException} if it could not be found.
  
  @param companyId the company ID
  @param externalReferenceCode the external reference code
  @return the matching commerce order item
  @throws NoSuchOrderItemException if a matching commerce order item could not be found