public void setFieldValue(_Fields field, @org.apache.thrift.annotation.Nullable java.lang.Object value) {
    switch (field) {
    case STAGE_ID:
      if (value == null) {
        unsetStageId();
      } else {
        setStageId((java.lang.String)value);
      }
      break;

    case STAGE_TYPE:
      if (value == null) {
        unsetStageType();
      } else {
        setStageType((StageType)value);
      }
      break;

    case STAGE_ATTRIBUTES:
      if (value == null) {
        unsetStageAttributes();
      } else {
        setStageAttributes((java.util.Map<java.lang.String,java.lang.String>)value);
      }
      break;

    case STAGE_COUNTERS:
      if (value == null) {
        unsetStageCounters();
      } else {
        setStageCounters((java.util.Map<java.lang.String,java.lang.Long>)value);
      }
      break;

    case TASK_LIST:
      if (value == null) {
        unsetTaskList();
      } else {
        setTaskList((java.util.List<Task>)value);
      }
      break;

    case DONE:
      if (value == null) {
        unsetDone();
      } else {
        setDone((java.lang.Boolean)value);
      }
      break;

    case STARTED:
      if (value == null) {
        unsetStarted();
      } else {
        setStarted((java.lang.Boolean)value);
      }
      break;

    }
  }
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/Stage.java