public boolean isSet(_Fields field) {
    if (field == null) {
      throw new java.lang.IllegalArgumentException();
    }

    switch (field) {
    case SCHEDULE_KEY:
      return isSetScheduleKey();
    case EXECUTION_ID:
      return isSetExecutionId();
    case QUERY:
      return isSetQuery();
    case USER:
      return isSetUser();
    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/ScheduledQueryPollResponse.java