return Group.class;
    }

    // ===================================================================================
    //                                                                     Object Instance
    //                                                                     ===============
    @Override
    public Entity newEntity() {
        return new Group();
    }

In this section you will see how.

## The normal process { #the-normal-process }

The normal (default) process, is as follows.

A `FastAPI` application (instance) has an `.openapi()` method that is expected to return the OpenAPI schema.

As part of the application object creation, a *path operation* for `/openapi.json` (or for whatever you set your `openapi_url`) is registered.

        this.transitive = transitive;
    }

    /**
     * The {@code id} uniquely represents a value for this extensible enum.
     * This id should be used to compute the equality and hash code for the instance.
     *
     * @return the id
     */
    @Nonnull
    public String id() {
        return id;
    }

    public boolean isTransitive() {
        return transitive;
    }

 * @since 4.0.0
 */
@Experimental
@Immutable
public interface Request<S extends ProtoSession> {

    /**
     * Returns the session associated with this request.
     *
     * @return the session instance, never {@code null}
     */
    @Nonnull
    S getSession();

    /**
     * Returns the trace information associated with this request, if any.

    /** The raw data. */
    protected Object rawData = null;

    /** The serializer. */
    protected Function<Object, byte[]> serializer;

    /**
     * Creates a new ResultData instance.
     */
    public ResultData() {
        super();
    }

    /**
     * Set the raw data.
     * @param rawData the raw data object to set
     */
    public void setRawData(final Object rawData) {

    /** Serial version UID for serialization */
    private static final long serialVersionUID = 1L;

    /**
     * Default constructor for file configuration pager.
     * Creates a new instance with default values.
     */
    public FileConfigPager() {
        // Default constructor
    }

    /** Default page size for pagination */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /**
     * Version number for optimistic locking.
     */
    public String versionNo;

    /**
     * Default constructor for RelatedQueryPager.
     * Initializes a new instance with default values for pagination
     * and related query fields.
     */
    public RelatedQueryPager() {
        // Default constructor - fields will be initialized to default values
    }

    /**

 */
public class FileConfigService extends FessAppService {

    /**
     * Default constructor for file configuration service.
     * Creates a new instance with default values.
     */
    public FileConfigService() {
        super();
    }

    /**
     * Behavior class for file configuration database operations.

        return RequestHeader.class;
    }

    // ===================================================================================
    //                                                                     Object Instance
    //                                                                     ===============
    @Override
    public Entity newEntity() {
        return new RequestHeader();
    }

        assertNull(exception.getCause());
    }

    public void test_instanceOfFessSystemException() {
        // Verify that ContentNotFoundException is an instance of FessSystemException
        String parentUrl = "http://example.com/parent";
        String url = "http://example.com/child";
        ContentNotFoundException exception = new ContentNotFoundException(parentUrl, url);