You can define arbitrarily deeply nested models:

{* ../../docs_src/body_nested_models/tutorial007_py310.py hl[7,12,18,21,25] *}

/// info

Notice how `Offer` has a list of `Item`s, which in turn have an optional list of `Image`s

///

## Bodies of pure lists { #bodies-of-pure-lists }

    private ScrollOperationHelper() {
        // Utility class
    }

    /**
     * Functional interface for processing search hits during scroll operations.
     *
     * @param <T> The type of item to accumulate
     */
    @FunctionalInterface
    public interface HitProcessor<T> {
        /**
         * Process a single search hit and optionally add results to the accumulator.
         *

    // Each group is a List of items, each item has a list of factory args.
    List<List<List<Object>>> argGroups = new ArrayList<>();
    argGroups.add(ImmutableList.of(args, equalArgs));
    EqualsTester tester =
        new EqualsTester(
            /* itemReporter= */ item -> {
              List<Object> factoryArgs = argGroups.get(item.groupNumber).get(item.itemNumber);
              return factory.getName()

        }

        private
        inline fun <reified T> inAnyOrder(items: List<T>): Matcher<Iterable<T>> = inAnyOrder(items.toTypedArray())

        /**
         * Matcher checking each item is present exactly once in a given iterable, but an any position,
         * and that there are no unexpected items.
         */
        private

		return nil
	}

	if len(s.Items) == 0 {
		return nil
	}

	if err := e.EncodeToken(start); err != nil {
		return err
	}

	for _, item := range s.Items {
		if err := e.Encode(xmlKeyEntry{
			XMLName: xxml.Name{Local: item.Key},
			Value:   item.Value,
		}); err != nil {
			return err
		}
	}

	return e.EncodeToken(start.End())
}

        else:
            return deepcopy(field.default), []
    return field.validate(value, values, loc=loc)


def _is_json_field(field: ModelField) -> bool:
    return any(type(item) is Json for item in field.field_info.metadata)


def _get_multidict_value(
    field: ModelField, values: Mapping[str, Any], alias: str | None = None
) -> Any:
    alias = alias or get_validation_alias(field)
    if (

		p.lineNum = p.lex.Line()
		switch tok {
		case '\n', ';':
			continue
		case scanner.EOF:
			return "", "", nil, false
		}
		break
	}
	// First item must be an identifier.
	if tok != scanner.Ident {
		p.errorf("expected identifier, found %q", p.lex.Text())
		return "", "", nil, false // Might as well stop now.
	}
	word, cond = p.lex.Text(), ""

                            final List<RequestParameter> result = new ArrayList<>();
                            for (Object item : list) {
                                if (item instanceof List<?> pair) {
                                    if (pair.size() == 2 && pair.get(0) instanceof String name

	var (
		assigns  []clause.Assignment
		assocOps []clause.Association
	)

	for _, item := range items {
		// Check if it's an AssociationAssigner
		if assocAssigner, ok := item.(clause.AssociationAssigner); ok {
			assocOps = append(assocOps, assocAssigner.AssociationAssignments()...)
		} else {
			assigns = append(assigns, item.Assignments()...)
		}
	}

	return setCreateOrUpdateG[T]{
		c:        c,

		return nil
	}

	if item.Policy != nil {
		meta.PolicyConfigJSON = item.Policy
		meta.PolicyConfigUpdatedAt = item.UpdatedAt
	}

	if item.Versioning != nil {
		configData, err := base64.StdEncoding.DecodeString(*item.Versioning)
		if err != nil {
			return wrapSRErr(err)
		}
		meta.VersioningConfigXML = configData
		meta.VersioningConfigUpdatedAt = item.UpdatedAt