have their default values. This is different from
                `response_model_exclude_defaults` in that if the fields are set,
                they will be included in the response, even if the value is the same
                as the default.

                When `True`, default values are omitted from the response.

                Read more about it in the

     * created automatically.
     *
     * @param output The file to serialize the model to, must not be {@code null}.
     * @param options The options to use for serialization, may be {@code null} to use the default values.
     * @param model The model to serialize, must not be {@code null}.
     * @throws IOException If the model could not be serialized.
     */

                break;
            case UNSPECIFIED:
                result += "Unspecified error";
                break;
            default:
                result += "Unknown error code: " + errorCode;
            }
            break;
        default:
            result += "unknown error class: " + errorClass;
        }
        return result;
    }

			Description: DefaultComment,
			Optional:    true,
		},
	}
)

// DefaultHelpPostfix - Helper function to add (default: $value) messages in config help
func DefaultHelpPostfix(subsystem KVS, key string) string {
	val, found := subsystem.Lookup(key)
	if !found || val == "" {
		return ""
	}
	return " (default: '" + val + "')"

 * override {@code putAll} as well, either providing your own implementation, or delegating to the
 * provided {@code standardPutAll} method.
 *
 * <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 ForwardingSortedMap}.
 *

DefaultType = TypeVar("DefaultType")


def Default(value: DefaultType) -> DefaultType:
    """
    You shouldn't use this function directly.

    It's used internally to recognize when a default value has been overwritten, even
    if the overridden default value was truthy.
    """

    @Nonnull
    default Path findMandatoryRoot(Path basedir) {
        Path rootDirectory = findRoot(basedir);
        if (rootDirectory == null) {
            throw new IllegalStateException(getNoRootMessage());
        }
        return rootDirectory;
    }

    @Nullable
    default Path findRoot(Path basedir) {
        Path rootDirectory = basedir;

///

That would generate a `dict` with only the data that was set when creating the `item` model, excluding default values.

Then you can use this to generate a `dict` with only the data that was set (sent in the request), omitting default values:

//// tab | Python 3.10+

```Python hl_lines="32"
{!> ../../docs_src/body_updates/tutorial002_py310.py!}
```

////

 * This is only necessary for default components using @Typed that want to support overriding.
 *
 * As a non-default component this now gets a negative priority relative to other implementations
 * of the same interface. Since we want to allow overriding this doesn't matter in this case.
 * (if it did we could add @Priority of 0 to match the priority given to default components.)
 *

    Artifact create(@Nonnull ArtifactFactoryRequest request);

    @Nonnull
    default Artifact create(
            @Nonnull Session session, String groupId, String artifactId, String version, String extension) {
        return create(ArtifactFactoryRequest.build(session, groupId, artifactId, version, extension));
    }

    @Nonnull
    default Artifact create(
            @Nonnull Session session,
            String groupId,