// one specified otherwise, return a 304 (not modified).
	ifNoneMatchETagHeader := r.Header.Get(xhttp.IfNoneMatch)
	if ifNoneMatchETagHeader != "" {
		if isETagEqual(objInfo.ETag, ifNoneMatchETagHeader) {
			// Do not care If-Modified-Since, Because:
			// 1. If If-Modified-Since condition evaluates to true.
			//  If both of the If-None-Match and If-Modified-Since headers are present in the request as follows:

          conditionValue = etag
        }

        lastModified != null -> {
          conditionName = "If-Modified-Since"
          conditionValue = lastModifiedString
        }

        servedDate != null -> {
          conditionName = "If-Modified-Since"
          conditionValue = servedDateString
        }

    /**
     * Gets the creation time.
     *
     * @return the creation time in milliseconds since epoch
     */
    long createTime();

    /**
     * Gets the last modified time.
     *
     * @return the last modified time in milliseconds since epoch
     */
    long lastModified();

    /**
     * Gets the file size.
     *
     * @return the file size in bytes
     */
    long length();

    }

    /**
     * Gets the not modified HTTP codes.
     *
     * @return the not modified HTTP codes
     */
    public int[] getNotModifiedHttpCodes() {
        return notModifiedHttpCodes;
    }

    /**
     * Sets the not modified HTTP codes.
     * @param notModifiedHttpCodes The not modified HTTP codes to set.
     */

// The returned object may not be modified.
func (sys *BucketMetadataSys) GetNotificationConfig(bucket string) (*event.Config, error) {
	meta, _, err := sys.GetConfig(GlobalContext, bucket)
	if err != nil {
		return nil, err
	}
	return meta.notificationConfig, nil
}

// GetSSEConfig returns configured SSE config
// The returned object may not be modified.

	// always emitted. The legacy MS-DOS date field is encoded according to the
	// location of the Modified time.
	Modified time.Time

	// ModifiedTime is an MS-DOS-encoded time.
	//
	// Deprecated: Use Modified instead.
	ModifiedTime uint16

	// ModifiedDate is an MS-DOS-encoded date.
	//
	// Deprecated: Use Modified instead.
	ModifiedDate uint16

	// CRC32 is the CRC32 checksum of the file content.

 * and processing of Sitemap data.
 * </p>
 *
 * <p>
 * The {@code loc} attribute specifies the URL of the Sitemap, while the {@code lastmod} attribute
 * indicates the last time the Sitemap file was modified.  The {@code lastmod} attribute is used by crawlers
 * to incrementally fetch sitemaps that have been updated since a certain date.
 * </p>
 *
 * <p>

        final UrlQueue<?> urlQueue = (UrlQueue<?>) objs[1];
        if (logger.isInfoEnabled()) {
            logger.info("Not modified URL: {}", urlQueue.getUrl());
        }
    }

    /**
     * Processes check last modified log events.
     *
     * @param objs the log objects (should contain UrlQueue)
     */
    protected void processCheckLastModified(final Object... objs) {

   *
   * @return {@code true} if the graph was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean removeNode(N node);

  /**
   * Removes the edge connecting {@code nodeU} to {@code nodeV}, if it is present.
   *
   * @return {@code true} if the graph was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean removeEdge(N nodeU, N nodeV);

    /**
     * Returns the last modified time of the accessed resource.
     *
     * @return the last modified time
     */
    Long getLastModified();

    /**
     * Sets the last modified time of the accessed resource.
     *
     * @param lastModified the last modified time
     */
    /**
     * Sets the last modified time of the accessed resource.
     *