A table defining a group of service objects from the
etsysFWServiceTable or a service group in
etsysFWServiceGroupTable. The services contained in the group
are defined in the etsysFWNetwkInNetGrpTable.
The implementation may choose to allow modifications to this
table only under certain SNMP contexts. The
etsysFWServiceGroupStorageType for a given SNMP context may be
readOnly, meaning the row cannot be modified or deleted. In
another SNMP context, the etsysFWServiceGroupStorageType value
could allow the row to be modified or deleted.