public void addToOperatorList(Operator elem) {
    if (this.operatorList == null) {
      this.operatorList = new java.util.ArrayList<Operator>();
    }
    this.operatorList.add(elem);
  }
Returns true if field operatorGraph is set (has been assigned a value) and false otherwise
ql/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/ql/plan/api/Task.java