Interface Extensions

interface Extensions {
    fieldModifiers: FieldModifiersExtension;
    history: HistoryExtension;
    htmlTemplate: HTMLTemplateExtension;
    localization: I18NExtension;
    storage: StorageExtensionBase;
    syncronization?: typeof SyncronizationExtensionBase;
    unload: UnloadExtension;
    [key: string]: unknown;
}