func (config *TierConfigMgr) Edit(ctx context.Context, tierName string, creds madmin.TierCreds) error {
	config.Lock()
	defer config.Unlock()

	// check if tier by this name exists
	tierType, exists := config.isTierNameInUse(tierName)
	if !exists {
		return errTierNotFound
	}

	cfg := config.Tiers[tierName]
	switch tierType {
	case madmin.S3:
		if creds.AWSRole {
			cfg.S3.AWSRole = true
		}

     * @param url The URL to check.
     * @return true if the URL exists in the queue, false otherwise.
     */
    @Override
    protected boolean exists(final String sessionId, final String url) {
        final boolean ret = super.exists(sessionId, url);
        if (!ret) {
            final QueueHolder queueHolder = getQueueHolder(sessionId);
            final Queue<OpenSearchUrlQueue> waitingQueue = queueHolder.waitingQueue;

		// the directory.
		bindDN, err := l.LDAP.LookupUsername(conn, username)
		if err != nil {
			if strings.Contains(err.Error(), "User DN not found for") {
				return nil, nil
			}
			return nil, fmt.Errorf("Unable to find user DN: %w", err)
		}
		return bindDN, nil
	}

	// Since the username parses as a valid DN, check that it exists and is

	}
	if s3Error := checkRequestAuthType(ctx, r, policy.PutReplicationConfigurationAction, bucket, ""); s3Error != ErrNone {
		writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Error), r.URL)
		return
	}
	// Check if bucket exists.
	if _, err := objectAPI.GetBucketInfo(ctx, bucket, BucketOptions{}); err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

        }

        @Test
        @DisplayName("exists should indicate resource existence")
        void testExists() throws CIFSException {
            // Given
            when(mockResource.exists()).thenReturn(true);

            // When
            boolean exists = mockResource.exists();

            // Then
            assertTrue(exists, "Resource should exist");
        }

        @Test

            if (className.contains(appWebPkg) && className.endsWith(actionSuffix)) {
                // ## Assert ##
                markHere("exists");
                getComponent(clazz); // expect no exception
            }
        });
        assertMarked("exists");
    }
    */

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

        logger.error("  failure marker exists: ${failureMarker.exists()}")
        logger.error("  pid file exists: ${pidFile.exists()}")
        logger.error("  ports file exists: ${portsFile.exists()}")
        // also dump the log file for the startup script (which will include ES logging output to stdout)
        if (runLog.exists()) {
            logger.error("\n  [log]")

    /** The object name is invalid */
    int NT_STATUS_OBJECT_NAME_INVALID = 0xC0000033;
    /** The object was not found */
    int NT_STATUS_OBJECT_NAME_NOT_FOUND = 0xC0000034;
    /** The object name already exists */
    int NT_STATUS_OBJECT_NAME_COLLISION = 0xC0000035;
    /** The port is disconnected */
    int NT_STATUS_PORT_DISCONNECTED = 0xC0000037;
    /** The object path is invalid */

	}

	target.SourceBucket = bucket
	var ops []madmin.TargetUpdateType
	if update {
		ops = madmin.GetTargetUpdateOps(r.Form)
	} else {
		var exists bool // true if arn exists
		target.Arn, exists = globalBucketTargetSys.getRemoteARN(bucket, &target, "")
		if exists && target.Arn != "" { // return pre-existing ARN
			data, err := json.Marshal(target.Arn)
			if err != nil {

    fi ;
    sleep 2 ; # 1 second intervals between attempts
    $MC_COMMAND ;
    STATUS=$? ;
  done ;
  set -e ; # reset `e` as active
  return 0
}

# checkPolicyExists ($policy)
# Check if the policy exists, by using the exit code of `mc admin policy info`
checkPolicyExists() {
  POLICY=$1
  CMD=$(${MC} admin policy info myminio $POLICY > /dev/null 2>&1)
  return $?
}

# createPolicy($name, $filename)