func (s *Singleton[T]) GetNonBlocking() *T {
	select {
	case <-s.set:
		return s.v
	default:
		return nil
	}
}

// IsSet will return whether the singleton has been set.
func (s *Singleton[T]) IsSet() bool {
	select {
	case <-s.set:
		return true
	default:
		return false
	}
}

// Set the value and unblock all Get requests.

 * This class provides parsing capabilities for different types of Kerberos authorization data.
 */
public abstract class KerberosAuthData {

    /**
     * Default constructor for KerberosAuthData.
     */
    protected KerberosAuthData() {
        // Default constructor
    }

    /**
     * Parse Kerberos authorization data based on the authorization type.
     *
     * @param authType the type of authorization data

            return parsed;
        }
    }

    @Test
    @DisplayName("Default state is null for both fields")
    void defaultStateIsNull() {
        TestSpnegoToken t = new TestSpnegoToken();
        assertNull(t.getMechanismToken(), "mechanismToken should default to null");
        assertNull(t.getMechanismListMIC(), "mechanismListMIC should default to null");
    }

    @Test

    @jakarta.validation.Constraint(validatedBy = {})
    private @interface ValidCronRequired {
        String message() default "Must be a valid non-blank cron expression";

        Class<?>[] groups() default {};

        Class<? extends jakarta.validation.Payload>[] payload() default {};
    }

    private static class ComposedBean {
        @ValidCronRequired
        private String composedCron;

 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingListMultimap}.
 *
 * @author Kurt Alfred Kluever

 * desired per the <a href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingSortedSetMultimap}.
 *
 * @author Kurt Alfred Kluever

    }

    // Test default values
    @Test
    public void test_defaultValues() throws Exception {
        assertEquals("Default message should match", "{org.lastaflute.validator.constraints.UriType.message}", getDefaultMessage());
        assertEquals("Default groups should be empty", 0, getDefaultGroups().length);
        assertEquals("Default payload should be empty", 0, getDefaultPayload().length);
    }

                Arguments.of(NbtException.ERR_SSN_SRVC, 99, "ERR_SSN_SRVC/Unknown error code: 99"), // Default case for session service

                // Default error class
                Arguments.of(999, 0, "unknown error class: 999"));
    }

    /**
     * Test the toString method to ensure it returns the expected string format.
     */

 * behavior of {@link #offer} which can lead to unexpected behavior. In this case, you should
 * override {@code offer} as well.
 *
 * <p><b>{@code default} method warning:</b> This class does <i>not</i> forward calls to {@code
 * default} methods. Instead, it inherits their default implementations. When those implementations
 * invoke methods, they invoke methods on the {@code ForwardingDeque}.
 *
 * @author Kurt Alfred Kluever
 * @since 12.0

public class InstallBody {
    /** Name of the plugin to install (required, max 100 characters) */
    @Required
    @Size(max = 100)
    public String name;

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

    /** Version of the plugin to install (required, max 100 characters) */
    @Required
    @Size(max = 100)
    public String version;