doc.put("key", "value");
        assertEquals("value", DocumentUtil.getValue(doc, "key", String.class, "default"));

        doc.put("key", null);
        assertEquals("default", DocumentUtil.getValue(doc, "key", String.class, "default"));
    }

    public void test_list_with_null_elements() {
        Map<String, Object> doc = new HashMap<>();
        List<String> listWithNulls = Arrays.asList("a", null, "b", null, "c");

# /---------------------------------------------------------------------------
# lastafluteMap: (NotRequired - Default map:{})
#
# Specification:
# map:{
#     ; serviceName = [your service name]
#     ; domainPackage = [package]
#     ; environmentList = list:{ [environment name] }
#     ; isMakeActionHtml = [true or false]
#     ; commonMap = map:{
#         ; path = [relative path to common project from DBFlute client]

    return implied;
  }

  @Retention(RetentionPolicy.RUNTIME)
  @Inherited
  @TesterAnnotation
  public @interface Require {
    SetFeature[] value() default {};

    SetFeature[] absent() default {};
  }

Entonces:

```Python
q: Union[str, None] = Query(default=None)
```

...hace que el parámetro sea opcional, con un valor por defecto de `None`, lo mismo que:

```Python

        @Test
        @DisplayName("Default constructor should create instance with default values")
        void testDefaultConstructor() {
            // When
            DcerpcBind defaultBind = new DcerpcBind();

            // Then
            assertNotNull(defaultBind, "Default constructor should create instance");
            assertEquals(0, defaultBind.getOpnum(), "Default opnum should be 0");
        }

        @Test

var globalSFTPTrustedCAPubkey ssh.PublicKey

// https://cs.opensource.google/go/x/crypto/+/refs/tags/v0.22.0:ssh/common.go;l=46
// preferredKexAlgos specifies the default preference for key-exchange
// algorithms in preference order. The diffie-hellman-group16-sha512 algorithm
// is disabled by default because it is a bit slower than the others.
var preferredKexAlgos = []string{
	kexAlgoCurve25519SHA256, kexAlgoCurve25519SHA256LibSSH,

                break;
            case UNSPECIFIED:
                result.append("Unspecified error");
                break;
            default:
                result.append("Unknown error code: ").append(errorCode);
            }
            break;
        default:
            result.append("unknown error class: ").append(errorClass);
        }
        return result.toString();
    }

    /**

    /**
     * Dictionary ID for identifying the mapping dictionary to download.
     */
    @Required
    public String dictId;

    /**
     * Default constructor.
     */
    public DownloadForm() {
        // Use of default constructor
    }

    /**
     * Dictionary ID for identifying the synonym dictionary to download.
     */
    @Required
    public String dictId;

    /**
     * Default constructor.
     */
    public DownloadForm() {
        // Use of default constructor
    }

 */
public abstract class JobExecutor {
    /** Listener to handle shutdown events */
    protected ShutdownListener shutdownListener;

    /**
     * Default constructor.
     */
    public JobExecutor() {
        // Default constructor
    }

    /**
     * Executes a script with the specified script type and content.
     *
     * @param scriptType the type of script to execute