code: public static CommercePaymentMethodGroupRel findByG_E(long groupId,
  		String engineKey)
  		throws com.liferay.commerce.payment.exception.NoSuchPaymentMethodGroupRelException {
  		return getPersistence().findByG_E(groupId, engineKey);
  	}
docs: Returns the commerce payment method group rel where groupId = &#63; and engineKey = &#63; or throws a {@link NoSuchPaymentMethodGroupRelException} if it could not be found.
  
  @param groupId the group ID
  @param engineKey the engine key
  @return the matching commerce payment method group rel
  @throws NoSuchPaymentMethodGroupRelException if a matching commerce payment method group rel could not be found