return client != null && client.isConnected();
    }
    
    private void reregisterNotifications() {
        // Re-register all previous registrations
        // Implementation would store registration details for recovery
    }
}
```

### 8.2 Network Partition Handling
```java
public class WitnessNetworkPartitionHandler {
    public void handleNetworkPartition() {

    protected long durableHandleTimeout = 120000; // 2 minutes
    /** Maximum number of retry attempts for handle reconnection */
    protected int handleReconnectRetries = 3;
    /** Directory to store persistent handle state */
    protected String handleStateDirectory;

    // Directory leasing configuration fields
    /**
     * Whether to use directory leasing for cached directory listings
     */

t:before{content:"\f105"}.fa-angle-up:before{content:"\f106"}.fa-angry:before{content:"\f556"}.fa-angrycreative:before{content:"\f36e"}.fa-angular:before{content:"\f420"}.fa-ankh:before{content:"\f644"}.fa-app-store:before{content:"\f36f"}.fa-app-store-ios:before{content:"\f370"}.fa-apper:before{content:"\f371"}.fa-apple:before{content:"\f179"}.fa-apple-alt:before{content:"\f5d1"}.fa-apple-pay:before{content:"\f415"}.fa-archive:before{content:"\f187"}.fa-archway:before{content:"\f557"}.fa-arrow-...

            links = new CacheEntry<>(tf.getConfig().getDfsTtl());
            links.map.put("\\", dr);
            DfsReferralDataInternal tmp = dr;
            do {
                /*
                 * Store references to the map and key so that
                 * SmbFile.resolveDfs can re-insert the dr list with
                 * the dr that was successful so that subsequent

    checkNotNull(iterable);
    return new Iterator<T>() {
      Iterator<T> iterator = emptyModifiableIterator();

      @Override
      public boolean hasNext() {
        /*
         * Don't store a new Iterator until we know the user can't remove() the last returned
         * element anymore. Otherwise, when we remove from the old iterator, we may be invalidating

func TestUpdateColumnsSkipsAssociations(t *testing.T) {
	user := *GetUser("update_column_skips_association", Config{})
	DB.Create(&user)

	// Update a single field of the user and verify that the changed address is not stored.
	newAge := uint(100)
	user.Account.Number = "new_account_number"
	db := DB.Model(&user).UpdateColumns(User{Age: newAge})

	if db.RowsAffected != 1 {

		issFromToken, _ = v.(string)
	}

	// Since issFromToken can have `/` characters (it is typically the
	// provider URL), we hash and encode it to base64 here. This is needed
	// because there will be a policy mapping stored on drives whose
	// filename is this parentUser: therefore, it needs to have only valid
	// filename characters and needs to have bounded length.
	{
		h := sha256.New()

* y allí, busca el módulo `dependencies` (el archivo en `app/dependencies.py`)...
* y de él, importa la función `get_token_header`.

¡Eso funciona correctamente! 🎉

---

De la misma manera, si hubiéramos usado tres puntos `...`, como en:

```Python
from ...dependencies import get_token_header
```

eso significaría:

* e lá, encontre o módulo `dependencies` (o arquivo em `app/dependencies.py`)...
* e dele, importe a função `get_token_header`.

Isso funciona corretamente! 🎉

---

Da mesma forma, se tivéssemos usado três pontos `...`, como em:

```Python
from ...dependencies import get_token_header
```

isso significaria:

It's relatively tightly coupled with relational databases (like MySQL or PostgreSQL), so, having a NoSQL database (like Couchbase, MongoDB, Cassandra, etc) as the main store engine is not very easy.