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

    switch (field) {
    case CAT_NAME:
      return isSetCatName();
    case DB_NAME:
      return isSetDbName();
    case TBL_NAME:
      return isSetTblName();
    case WITH_AUTH:
      return isSetWithAuth();
    case USER:
      return isSetUser();
    case GROUP_NAMES:
      return isSetGroupNames();
    case PROJECTION_SPEC:
      return isSetProjectionSpec();
    case FILTER_SPEC:
      return isSetFilterSpec();
    case PROCESSOR_CAPABILITIES:
      return isSetProcessorCapabilities();
    case PROCESSOR_IDENTIFIER:
      return isSetProcessorIdentifier();
    case VALID_WRITE_ID_LIST:
      return isSetValidWriteIdList();
    }
    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/GetPartitionsRequest.java