when(response.getService()).thenReturn("A:");
        when(response.isValidTid()).thenReturn(true);
        when(response.getTid()).thenReturn(1);
        when(session.send(any(), any())).thenReturn(response);
        when(config.isIpcSigningEnforced()).thenReturn(false);

        SmbTreeImpl tree = new SmbTreeImpl(session, "SHARE", "A:");
        tree.treeConnect(null, null);

```mermaid
sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...

                            systemHelper.getCurrentTimeAsLong() - execTime, MemoryUtil.byteCountToDisplaySize(docList.getContentSize()),
                            MemoryUtil.getMemoryUsageLog());
                } else {

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Mock witness service for integration testing.
 * Simulates a basic witness service that can accept registrations
 * and send notifications.
 */
public class MockWitnessService implements AutoCloseable {
    private static final Logger log = LoggerFactory.getLogger(MockWitnessService.class);

    private ServerSocket serverSocket;

			Optional:    true,
			Type:        "string",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         BatchSize,
			Description: "Number of events per HTTP send to webhook target",
			Optional:    true,
			Type:        "number",
		},
		config.HelpKV{
			Key:         QueueSize,
			Description: "configure channel queue size for webhook targets",
			Optional:    true,

Ambos são equivalentes e, por baixo, são a mesma coisa, mas eu recomendaria `Union` em vez de `Optional` porque a palavra "opcional" sugere que o valor é opcional; na verdade, significa "pode ser `None`", mesmo quando não é opcional e continua sendo obrigatório.

Acho que `Union[SomeType, None]` é mais explícito quanto ao significado.

É apenas uma questão de palavras e nomes. Mas essas palavras podem influenciar como você e sua equipe pensam sobre o código.

            }
            sendRateLimitResponse(httpResponse, rateLimitHelper.getRetryAfterSeconds());
            return;
        }

        chain.doFilter(request, response);
    }

    /**
     * Send a 403 Forbidden response for blocked IPs.
     * @param response the HTTP response
     * @throws IOException if an I/O error occurs
     */

                req.setMaxOutputResponse(16);
                req.setFlags(Smb2IoctlRequest.SMB2_O_IOCTL_IS_FSCTL);
                final Smb2IoctlResponse resp = th.send(req, RequestParam.NO_RETRY);
                return ((SrvPipePeekResponse) resp.getOutputData()).getReadDataAvailable();
            }

	QueueLength int

	// TotalMessages is the total number of messages sent in the lifetime of the target
	TotalMessages int64

	// FailedMessages should log message count that failed to send.
	FailedMessages int64

```mermaid
sequenceDiagram
    participant App
    participant Client

    App->>App: Produce Item 1
    App->>Client: Send Item 1
    App->>App: Produce Item 2
    Client->>Client: Process Item 1
    App->>Client: Send Item 2
    App->>App: Produce Item 3
    Client->>Client: Process Item 2
    App->>Client: Send Item 3
    Client->>Client: Process Item 3
    Note over App: Keeps producing...
    Note over Client: Keeps consuming...