This object represents the last polled instance in the
table.
The value represented by this object will be relevent only
if the corresponding cbfStatusFileState is emptied(3) for
ephemeral files or ready(2) for volatile or permanent files.
A value of zeroDotZero indicates an absence of last polled
object.
An NMS can use the value of this object and populate the
cbfDefineObjectTableInstance to retrieve a contiguous set
of rows in a table.