defer func() {
		if unlockOnDefer {
			nsUnlocker()
		}
	}()

	// Acquire lock
	if !opts.NoLock {
		lock := z.NewNSLock(bucket, object)
		lkctx, err := lock.GetRLock(ctx, globalOperationTimeout)
		if err != nil {
			return nil, err
		}
		ctx = lkctx.Context()
		nsUnlocker = func() { lock.RUnlock(lkctx) }
		unlockOnDefer = true
	}

	checkPrecondFn := opts.CheckPrecondFn

			nsUnlocker()
		}
	}()

	// Acquire lock
	if !opts.NoLock {
		lock := er.NewNSLock(bucket, object)
		lkctx, err := lock.GetRLock(ctx, globalOperationTimeout)
		if err != nil {
			return nil, err
		}
		ctx = lkctx.Context()

		// Release lock when the metadata is verified, and reader
		// is ready to be read.
		//
		// This is possible to be lock free because

type IAMStorageAPI interface {
	// The role of the read-write lock is to prevent go routines from
	// concurrently reading and writing the IAM storage. The (r)lock()
	// functions return the iamCache. The cache can be safely written to
	// only when returned by `lock()`.
	lock() *iamCache
	unlock()
	rlock() *iamCache
	runlock()
	getUsersSysType() UsersSysType

func TestPluck(t *testing.T) {
	users := []*User{
		GetUser("pluck-user1", Config{}),
		GetUser("pluck-user2", Config{}),
		GetUser("pluck-user3", Config{}),
	}

	DB.Create(&users)

	var names []string
	if err := DB.Model(User{}).Where("name like ?", "pluck-user%").Order("name").Pluck("name", &names).Error; err != nil {
		t.Errorf("got error when pluck name: %v", err)
	}

	var names2 []string

func resetGlobalObjectAPI() {
	globalObjLayerMutex.Lock()
	globalObjectAPI = nil
	globalObjLayerMutex.Unlock()
}

// reset the value of the Global server config.
// set it to `nil`.
func resetGlobalConfig() {
	// hold the mutex lock before a new config is assigned.
	globalServerConfigMu.Lock()
	// Save the loaded config globally.
	globalServerConfig = nil
	globalServerConfigMu.Unlock()
}

func resetGlobalEndpoints() {

    }

    // reference queues, for garbage collection cleanup

    /** Cleanup collected entries when the lock is available. */
    void tryDrainReferenceQueues() {
      if (tryLock()) {
        try {
          maybeDrainReferenceQueues();
        } finally {
          unlock();
        }
      }
    }

    @GuardedBy("this")

    }

    // reference queues, for garbage collection cleanup

    /** Cleanup collected entries when the lock is available. */
    void tryDrainReferenceQueues() {
      if (tryLock()) {
        try {
          maybeDrainReferenceQueues();
        } finally {
          unlock();
        }
      }
    }

    @GuardedBy("this")

	bootstrapTraceMsg("IAM initialization started")
	globalServerConfigMu.RLock()
	s := globalServerConfig
	globalServerConfigMu.RUnlock()

	sys.Lock()
	sys.iamRefreshInterval = iamRefreshInterval
	sys.Unlock()

	r := rand.New(rand.NewSource(time.Now().UnixNano()))

	var (
		openidInit bool
		ldapInit   bool
		authNInit  bool

      }

    @JvmName("-addInterceptor") // Prefix with '-' to prevent ambiguous overloads from Java.
    inline fun addInterceptor(crossinline block: (chain: Interceptor.Chain) -> Response) =
      addInterceptor(Interceptor { chain -> block(chain) })

    /**
     * Returns a modifiable list of interceptors that observe a single network request and response.

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