@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case OPERATOR_ID:
      return getOperatorId();

    case OPERATOR_TYPE:
      return getOperatorType();

    case OPERATOR_ATTRIBUTES:
      return getOperatorAttributes();

    case OPERATOR_COUNTERS:
      return getOperatorCounters();

    case DONE:
      return isDone();

    case STARTED:
      return isStarted();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field started is set (has been assigned a value) and false otherwise
ql/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/ql/plan/api/Operator.java