CashRoundingConfigField example

new ManyToOneAssociationField('language', 'language_id', LanguageDefinition::class, 'id', false))->addFlags(new ApiAware()),
            new ManyToOneAssociationField('salesChannel', 'sales_channel_id', SalesChannelDefinition::class, 'id', false),
            (new OneToManyAssociationField('addresses', OrderAddressDefinition::class, 'order_id'))->addFlags(new ApiAware(), new CascadeDelete(), new SearchRanking(SearchRanking::ASSOCIATION_SEARCH_RANKING)),
            (new ManyToOneAssociationField('billingAddress', 'billing_address_id', OrderAddressDefinition::class))->addFlags(new ApiAware()),
            (new OneToManyAssociationField('deliveries', OrderDeliveryDefinition::class, 'order_id'))->addFlags(new ApiAware(), new CascadeDelete(), new SearchRanking(SearchRanking::ASSOCIATION_SEARCH_RANKING)),
            (new OneToManyAssociationField('lineItems', OrderLineItemDefinition::class, 'order_id'))->addFlags(new ApiAware(), new CascadeDelete()),
            (new OneToManyAssociationField('transactions', OrderTransactionDefinition::class, 'order_id'))->addFlags(new ApiAware(), new CascadeDelete()),
            (new OneToManyAssociationField('documents', DocumentDefinition::class, 'order_id'))->addFlags(new ApiAware()),
            (new ManyToManyAssociationField('tags', TagDefinition::class, OrderTagDefinition::class, 'order_id', 'tag_id'))->addFlags(new ApiAware(), new SearchRanking(SearchRanking::ASSOCIATION_SEARCH_RANKING)),
            new ManyToOneAssociationField('createdBy', 'created_by_id', UserDefinition::class, 'id', false),
            new ManyToOneAssociationField('updatedBy', 'updated_by_id', UserDefinition::class, 'id', false),
            (new CashRoundingConfigField('item_rounding', 'itemRounding'))->addFlags(new Required()),
            (new CashRoundingConfigField('total_rounding', 'totalRounding'))->addFlags(new Required()),
        ]);
    }
}

new IntField('position', 'position'))->addFlags(new ApiAware()),
            (new BoolField('is_system_default', 'isSystemDefault'))->addFlags(new ApiAware(), new Runtime()),
            (new FloatField('tax_free_from', 'taxFreeFrom'))->addFlags(new ApiAware()),
            (new TranslatedField('customFields'))->addFlags(new ApiAware()),
            (new TranslationsAssociationField(CurrencyTranslationDefinition::class, 'currency_id'))->addFlags(new Required()),
            (new OneToManyAssociationField('salesChannelDefaultAssignments', SalesChannelDefinition::class, 'currency_id', 'id'))->addFlags(new RestrictDelete()),
            (new OneToManyAssociationField('orders', OrderDefinition::class, 'currency_id', 'id'))->addFlags(new RestrictDelete()),
            new ManyToManyAssociationField('salesChannels', SalesChannelDefinition::class, SalesChannelCurrencyDefinition::class, 'currency_id', 'sales_channel_id'),
            (new OneToManyAssociationField('salesChannelDomains', SalesChannelDomainDefinition::class, 'currency_id'))->addFlags(new RestrictDelete()),
            (new OneToManyAssociationField('promotionDiscountPrices', PromotionDiscountPriceDefinition::class, 'currency_id', 'id'))->addFlags(new CascadeDelete()),
            (new OneToManyAssociationField('productExports', ProductExportDefinition::class, 'currency_id', 'id'))->addFlags(new RestrictDelete()),
            (new CashRoundingConfigField('item_rounding', 'itemRounding'))->addFlags(new ApiAware(), new Required()),
            (new CashRoundingConfigField('total_rounding', 'totalRounding'))->addFlags(new ApiAware(), new Required()),
            (new OneToManyAssociationField('countryRoundings', CurrencyCountryRoundingDefinition::class, 'currency_id'))->addFlags(new CascadeDelete()),
        ]);
    }
}

protected function defineFields(): FieldCollection
    {
        $fields = new FieldCollection([
            (new IdField('id', 'id'))->addFlags(new PrimaryKey(), new Required()),

            (new FkField('currency_id', 'currencyId', CurrencyDefinition::class))
                ->addFlags(new Required()),

            (new FkField('country_id', 'countryId', CountryDefinition::class))
                ->addFlags(new Required()),

            (new CashRoundingConfigField('item_rounding', 'itemRounding'))
                ->addFlags(new Required()),

            (new CashRoundingConfigField('total_rounding', 'totalRounding'))
                ->addFlags(new Required()),
        ]);

        // disable dal validation command         $fields->add(new ManyToOneAssociationField('currency', 'currency_id', CurrencyDefinition::class));
        $fields->add(
            (new ManyToOneAssociationField('country', 'country_id', CountryDefinition::class))
                ->addFlags(new SearchRanking(SearchRanking::ASSOCIATION_SEARCH_RANKING))
        );