A table defining the services in a service group.
The implementation may choose to allow modifications to this
table only under certain SNMP contexts. The
etsysFWServiceInSvcGrpStorageType for a given SNMP context may be
readOnly, meaning the row cannot be modified or deleted. In
another SNMP context, the etsysFWServiceInSvcGrpStorageType value
could allow the row to be modified or deleted.