* Provides methods for user management and authentication operations.
 */
public interface AuthenticationChain {

    /**
     * Updates an existing user in the authentication chain.
     * @param user The user to update.
     */
    void update(User user);

    /**
     * Deletes a user from the authentication chain.
     * @param user The user to delete.
     */
    void delete(User user);

		b += slashSeparator
	}
	return b
}

// update cache with new status.
// The updates are conditional so multiple callers can update with different states.
func (m *metacache) update(update metacache) {
	now := UTCNow()
	m.lastUpdate = now

	if update.lastHandout.After(m.lastHandout) {
		m.lastHandout = update.lastUpdate
		if m.lastHandout.After(now) {
			m.lastHandout = now
		}
	}

				rTimer.Reset(defaultHealthCheckReloadDuration)
			case <-ctx.Done():
				return
			}
		}
	}()
	go sys.heartBeat(ctx)
	return sys
}

// UpdateAllTargets updates target to reflect metadata updates
func (sys *BucketTargetSys) UpdateAllTargets(bucket string, tgts *madmin.BucketTargets) {
	if sys == nil {
		return
	}
	sys.Lock()
	defer sys.Unlock()

    }

    /**
     * Updates an access result in the OpenSearch index.
     *
     * @param accessResult The access result to update.
     */
    @Override
    public void update(final OpenSearchAccessResult accessResult) {
        super.insert(accessResult, OpType.INDEX);
    }

    /**
     * Updates multiple access results in the OpenSearch index.
     *

func (r *ReplicationStats) srUpdate(sr replStat) {
	dID, err := globalSiteReplicationSys.getDeplIDForEndpoint(sr.endpoint())
	if err == nil {
		r.srStats.update(sr, dID)
	}
}

// Update updates in-memory replication statistics with new values.
func (r *ReplicationStats) Update(bucket string, ri replicatedTargetInfo, status, prevStatus replication.StatusType) {
	if r == nil {
		return
	}
	var rs replStat
	switch status {

    }

    // PUT /api/admin/general
    /**
     * Updates the general system settings.
     * Merges the provided settings with existing configuration and applies changes.
     *
     * @param body the general settings data to update
     * @return JSON response with update status
     */
    @Execute
    public JsonResponse<ApiResult> put$index(final EditBody body) {

        assertFalse(kuromojiItem2.isUpdated());

        final KuromojiItem kuromojiItem3 = itemList2.get(2);
        kuromojiItem3.setNewToken("TOKEN3");
        kuromojiItem3.setNewSegmentation("SEG3");
        kuromojiItem3.setNewReading("READING3");
        kuromojiItem3.setNewPos("POS3");
        kuromojiFile.update(kuromojiItem3);

	parent.FavChild = &child
	DB.Save(&parent)

	var parent1 Parent
	DB.First(&parent1, parent.ID)
	AssertObjEqual(t, parent, parent1, "ID", "FavChildID")

	// Save and Updates is the same
	DB.Updates(&parent)
	DB.First(&parent1, parent.ID)
	AssertObjEqual(t, parent, parent1, "ID", "FavChildID")
}

func TestSaveHasManyCircularReference(t *testing.T) {
	parent := Parent{}
	DB.Create(&parent)

        });
        return redirect(getClass());
    }

    /**
     * Updates an existing key match.
     *
     * @param form the edit form
     * @return HTML response after update
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse update(final EditForm form) {
        verifyCrudMode(form.crudMode, CrudMode.EDIT);

			expectedRespStatus: http.StatusBadRequest,
		},

		// Test case - 6.
		// Test case with new object name is same as object to be copied
		// but metadata is updated.
		6: {
			bucketName:       bucketName,
			newObjectName:    objectName,
			copySourceHeader: url.QueryEscape(SlashSeparator + bucketName + SlashSeparator + objectName),
			metadata: map[string]string{