for (int i = 0; i < nameBytes.length; i++) {
            assertEquals(nameBytes[i], dst[12 + i]);
        }
        assertEquals((byte) 0x00, dst[12 + nameBytes.length]);
    }

    /**
     * read*WireFormat methods in request return 0 (not implemented for requests).
     */
    @Test
    void testReadWireFormatStubsReturnZero() {
        // Given

            throws IOException;

    /**
     * Calculates checksums for specified stream. Upon this method returns, the stream will be depleted (fully read)
     * but not closed.
     *
     * @param stream      The stream for which to calculate checksums, must not be {@code null}.
     * @param algorithms  The checksum algorithms to use, must not be {@code null}.

		Stmts:    stmt_store.New(maxSize, ttl), // Initializes a new statement store with the specified maximum size and TTL.
		Mux:      &sync.RWMutex{},              // Sets up a read-write mutex for synchronizing access to the statement store.
	}
}

// GetDBConn returns the underlying *sql.DB connection
func (db *PreparedStmtDB) GetDBConn() (*sql.DB, error) {

	resp := lockRPCRLock.NewResponse()
	success, err := l.ll.RLock(ctx, *args)
	if err == nil && !success {
		err = errLockConflict
	}
	return l.makeResp(resp, err)
}

// RUnlockHandler - releases the acquired read lock.
func (l *lockRESTServer) RUnlockHandler(args *dsync.LockArgs) (*dsync.LockResp, *grid.RemoteErr) {
	resp := lockRPCRUnlock.NewResponse()

		n := 1
		var base, ext string
		base = *privKeyPath
		if idx := strings.LastIndexByte(base, '.'); idx != -1 {
			ext = base[idx:]
			base = base[:idx]
		}
		for {
			// Automatically read "file.ext", "file-2.ext", "file-3.ext"...
			fn := base + ext
			if n > 1 {
				fn = fmt.Sprintf("%s-%d%s", base, n, ext)
			}

			if b, err := os.ReadFile(fn); err == nil {
				privateKeys = append(privateKeys, b)

	// Write all data, syncs the data to disk.
	// Should be used for smaller payloads.
	WriteAll(ctx context.Context, volume string, path string, b []byte) (err error)

	// Read all.
	ReadAll(ctx context.Context, volume string, path string) (buf []byte, err error)
	GetDiskLoc() (poolIdx, setIdx, diskIdx int) // Retrieve location indexes.

	if o.args.AuthToken != "" {
		req.Header.Set("Authorization", o.args.AuthToken)
	}

	resp, err := o.client.Do(req)
	if err != nil {
		return false, err
	}
	defer o.args.CloseRespFn(resp.Body)

	// Read the body to be saved later.
	opaRespBytes, err := io.ReadAll(resp.Body)
	if err != nil {
		return false, err
	}

	// Handle large OPA responses when OPA URL is of

 * elements FIFO (first-in-first-out). The head of the queue is that element that has been
 * on the queue the longest time. The tail of the queue is that element that has been on
 * the queue the shortest time. New elements are inserted at the tail of the queue, and the queue
 * retrieval operations obtain elements at the head of the queue.
 *

We see that we are going to need some dependencies used in several places of the application.

So we put them in their own `dependencies` module (`app/dependencies.py`).

We will now use a simple dependency to read a custom `X-Token` header:

{* ../../docs_src/bigger_applications/app_an_py39/dependencies.py hl[3,6:8] title["app/dependencies.py"] *}

/// tip

We are using an invented header to simplify this example.

#### Operação { #operation }

"Operação" aqui se refere a um dos "métodos" HTTP.

Um dos:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...e os mais exóticos:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

No protocolo HTTP, você pode se comunicar com cada path usando um (ou mais) desses "métodos".

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