This object controls the creation and deletion of a row
in stpxSMSTInstanceEditTable.
When creating an entry in this table, 'createAndGo' method
is used and the value of this object is set to 'active'.
Deactivation of an 'active' entry is not allowed. When
deleting an entry in this table, 'destroy' method is used.
Once a row becomes active, value in any other column
within such a row may be modified. When a row is active,
setting the instance of stpxSMSTInstanceEditVlansMap1k2k
stpxSMSTInstanceEditVlansMap3k4k for the same MST instance
both to the value of zero length can not be allowed.