interface InitialData {
  defaultLanguage: LanguageCode;
  defaultZone: string;
  roles?: RoleDefinition[];
  countries: CountryDefinition[];
  taxRates: Array<{ name: string; percentage: number }>;
  shippingMethods: Array<{ name: string; price: number }>;
  paymentMethods: Array<{ name: string; handler: ConfigurableOperationInput }>;
  collections: CollectionDefinition[];
}