Then you declare your data model as a class that inherits from `BaseModel`.

Use standard Python types for all the attributes:

{* ../../docs_src/body/tutorial001_py310.py hl[5:9] *}


The same as when declaring query parameters, when a model attribute has a default value, it is not required. Otherwise, it is required. Use `None` to make it just optional.

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========

    /**
     * Default constructor.
     */
    public ImplementedInvokerAssistant() {
        // Default constructor

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** Service for managing search log data */
    @Resource
    private SearchLogService searchLogService;

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========

    // ===================================================================================

        super();
    }

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    /** The web config service for managing web configuration settings. */
    @Resource
    private WebConfigService webConfigService;

public class BsUserInfoCB extends EsAbstractConditionBean {

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    protected BsUserInfoCQ _conditionQuery;
    protected BsUserInfoCA _conditionAggregation;

public class BsGroupCB extends EsAbstractConditionBean {

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    protected BsGroupCQ _conditionQuery;
    protected BsGroupCA _conditionAggregation;
    protected HpSpecification _specification;

/**
 * SMB1 NT Transaction subcommand for file system change notification.
 *
 * This transaction allows monitoring of file system changes in a directory,
 * such as file creation, modification, deletion, and attribute changes.
 */
public class NtTransNotifyChange extends SmbComNtTransaction {

    int fid;
    private final int completionFilter;
    private final boolean watchTree;

    /**

import javax.crypto.Mac;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import javax.security.auth.kerberos.KerberosKey;

/**
 * Utility class for calculating and verifying PAC (Privilege Attribute Certificate) message authentication codes.
 * This class provides methods for computing MACs using various Kerberos encryption types including
 * ARCFOUR-HMAC-MD5 and AES-based HMAC algorithms.
 */
public class PacMac {

    private static final long serialVersionUID = 1L;

    // ===================================================================================
    //                                                                           Attribute
    //                                                                           =========
    protected DocMeta docMeta;
    protected final EntityUniqueDrivenProperties __uniqueDrivenProperties = newUniqueDrivenProperties();