broadcastPlanChannels.add(broadcastChannels);
}
final ArrayList<PlanNode> outputPlans = new ArrayList<PlanNode>();
final BinaryUnionOpDescriptor operator = new BinaryUnionOpDescriptor();
final RequestedLocalProperties noLocalProps = new RequestedLocalProperties();
final int dop = getDegreeOfParallelism();
final int subPerInstance = getSubtasksPerInstance();
final int numInstances = dop / subPerInstance + (dop % subPerInstance == 0 ? 0 : 1);