nerate again the bagging, This is used during model selection when incrementally adding the trees
</p></div><dl class="paramcmts block"><dt class="param">numTrees</dt><dd class="cmt"><p>the number of trees that require the bagging</p></dd><dt class="param">partitionIndex</dt><dd class="cmt"><p>the partition identifier of the RDD currently processed</p></dd><dt class="param">instances</dt><dd class="cmt"><p>the instances in the partition of the RDD</p></dd><dt>returns</dt><dd class="cmt"><p>the set of instan