Javadoc
Return true iff the
IChunkMessage is for the last evaluation pass
of an operator. The last evaluation pass for an operator must be
requested using an annotation. When it is requested, the operator will be
invoked one more time for each node or shard on which it was run
(depending on the
BOpEvaluationContext). When so invoked, the
IChunkMessage will be associated with an empty source and this
flag will be set.