<img src="/img/tutorial/extending-openapi/image04.png">

## Change Default Swagger UI Parameters { #change-default-swagger-ui-parameters }

FastAPI includes some default configuration parameters appropriate for most of the use cases.

It includes these default configurations:

{* ../../fastapi/openapi/docs.py ln[9:24] hl[18:24] *}

    }

    /**
     * Data transfer object representing filesystem statistics.
     */
    public static class FsObj {
        /**
         * Default constructor.
         */
        public FsObj() {
            // Default constructor
        }

        /** The percentage of used space on the filesystem. */
        public short percent;
        /** Used space in bytes */

    }

    /**
     * LSA Quality of Service information.
     */
    public static class LsarQosInfo extends NdrObject {

        /**
         * Default constructor for LsarQosInfo.
         */
        public LsarQosInfo() {
            // Default constructor
        }

        /** Length of the QoS information. */
        public int length;
        /** Security impersonation level. */

        return defaultMaxLength;
    }

    /**
     * Returns the default maximum content length.
     * @return The default maximum content length in bytes.
     */
    public long getDefaultMaxLength() {
        return defaultMaxLength;
    }

    /**
     * Sets the default maximum content length.
     * @param defaultMaxLength The default maximum content length to set.
     */

     *
     * @param message the debug message to be logged
     */
    default void debug(String message) {
        log(Level.DEBUG, message);
    }

    /**
     * Logs a debug message with an associated exception.
     *
     * @param message the debug message to be logged
     * @param error the associated exception
     */
    default void debug(@Nonnull String message, @Nullable Throwable error) {

    @Nonnull
    Path userHomeDirectory();

    /**
     * Shorthand for {@link MessageBuilderFactory}.
     */
    default MessageBuilderFactory messageBuilderFactory() {
        return parserRequest().messageBuilderFactory();
    }

    /**
     * Shorthand for {@link Lookup}.
     */
    default Lookup lookup() {
        return parserRequest().lookup();
    }

    /**

    /** The maximum cached content size in bytes. Default is 1MB. */
    protected long maxCachedContentSize = 1024L * 1024L; // 1MB

    /** The access timeout in seconds. Default is null (no timeout). */
    protected Integer accessTimeout = null; // seconds

    /** The maximum content length in bytes. Default is null (no limit). */
    protected Long maxContentLength = null;

    /**

        assertTrue(DefaultMirrorSelector.matchesLayout("default", "default,legacy"));

        assertFalse(DefaultMirrorSelector.matchesLayout("default", "legacy,!default"));
        assertFalse(DefaultMirrorSelector.matchesLayout("default", "!default,legacy"));

        assertFalse(DefaultMirrorSelector.matchesLayout("default", "*,!default"));
        assertFalse(DefaultMirrorSelector.matchesLayout("default", "!default,*"));

			passwordEnv = passwordEnv + config.Default + k
		}
		userEnv := target.EnvRedisUser
		if k != config.Default {
			userEnv = userEnv + config.Default + k
		}
		keyEnv := target.EnvRedisKey
		if k != config.Default {
			keyEnv = keyEnv + config.Default + k
		}
		queueDirEnv := target.EnvRedisQueueDir
		if k != config.Default {
			queueDirEnv = queueDirEnv + config.Default + k
		}

#
# {Java} Seasar Only:
# o dbfluteDiconNamespace: (NotRequired - Default 'dbflute')
# o dbfluteDiconPackageName: (NotRequired - Default '../resources')
# o dbfluteDiconFileName: (NotRequired - Default 'dbflute.dicon')
# o j2eeDiconResourceName: (NotRequired - Default 'j2ee.dicon')
#
# {Java} Lasta Di Only:
# o dbfluteDiXmlNamespace: (NotRequired - Default 'dbflute')