// along with any necessary parents, and returns nil,
// or else returns an error.
// The permission bits perm (before umask) are used for all
// directories that MkdirAll creates.
// If path is already a directory, MkdirAll does nothing
// and returns nil.
func osMkdirAll(dirPath string, perm os.FileMode, baseDir string) error {
	if baseDir != "" {
		if strings.HasPrefix(baseDir, dirPath) {
			return nil
		}
	}

  /**
   * Start the service.
   *
   * <p>By default this method does nothing.
   */
  protected void startUp() throws Exception {}

  /**
   * Stop the service. This is guaranteed not to run concurrently with {@link #runOneIteration}.
   *
   * <p>By default this method does nothing.
   */
  protected void shutDown() throws Exception {}

  /**

            final String key = entry.getKey();
            final String[] values = entry.getValue();
            if (values == null) {
                // nothing
            } else if (values.length == 1) {
                queryBuf.append(' ').append(key).append(":\"").append(values[0]).append('\"');
            } else if (values.length > 1) {
                boolean first = true;

  val hpackWriter: Hpack.Writer = Hpack.Writer(out = hpackBuffer)

  @Throws(IOException::class)
  fun connectionPreface() {
    withLock {
      if (closed) throw IOException("closed")
      if (!client) return // Nothing to write; servers don't send connection headers!
      if (logger.isLoggable(FINE)) {
        logger.fine(format(">> CONNECTION ${CONNECTION_PREFACE.hex()}"))
      }
      sink.write(CONNECTION_PREFACE)
      sink.flush()

  /**
   * Start the service.
   *
   * <p>By default this method does nothing.
   */
  protected void startUp() throws Exception {}

  /**
   * Stop the service. This is guaranteed not to run concurrently with {@link #runOneIteration}.
   *
   * <p>By default this method does nothing.
   */
  protected void shutDown() throws Exception {}

  /**

        // Then - nothing should happen (empty implementation)
        verifyNoInteractions(request);
    }

    @Test
    @DisplayName("Should setup response correctly")
    void testSetupResponse() {
        // Given
        Response resp = mock(Response.class);

        // When
        response.setupResponse(resp);

        // Then - nothing should happen (empty implementation)

 * various sources, and managing elevate words and bad words.
 */
public class SuggestHelper {
    /**
     * Constructs a new suggest helper.
     */
    public SuggestHelper() {
        // do nothing
    }

    private static final Logger logger = LogManager.getLogger(SuggestHelper.class);

    /** The separator for text content. */
    protected static final String TEXT_SEP = " ";

#### Kiểm tra `openapi.json`

Nếu bạn tò mò về việc cấu trúc OpenAPI nhìn như thế nào thì FastAPI tự động sinh một JSON (schema) với các mô tả cho tất cả API của bạn.

    /**
     * An item of a label type.
     */
    protected static class LabelTypeItem {
        /**
         * Default constructor.
         */
        public LabelTypeItem() {
            // do nothing
        }

        private String label;

        private String value;

        private String[] permissions;

        private String virtualHost;

        private Locale locale;

        // Spy on the connection to verify handshake() is called
        NtlmHttpURLConnection spiedConnection = spy(ntlmConnection);
        doNothing().when(spiedConnection).connect();
        // Mock the handshake process to do nothing complex
        mockResponse(HTTP_OK, "OK", null, null);

        // Act & Assert
        assertDoesNotThrow(() -> spiedConnection.getResponseCode());
        // Use reflection to verify handshake method is called