@org.apache.thrift.annotation.Nullable
  public java.util.Iterator<Task> getTaskListIterator() {
    return (this.taskList == null) ? null : this.taskList.iterator();
  }
Returns true if field stageCounters is set (has been assigned a value) and false otherwise
ql/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/ql/plan/api/Stage.java