A row instance contains the IP address mask, source type
and its status. A row instance can be created or removed
by the system or by setting the appropriate value of its
RowStatus object.
A row instance is indexed by a group name, type and value
of an IP address. The group name index must exist in the
cpgGroupTable. If a group name is deleted from cpgGroupTable,
entries in this table using this group as an index will also be
automatically removed.