import { DataPointExtension } from './DataPointExtension';
/**
 * format :
 * {{"@some.key.name:[default text]"}}
 */
export declare class I18nExtension extends DataPointExtension {
    static setMessages(messages: {
        [key: string]: string;
    }): void;
    static getMessage(key: string): string;
    static registerInstance(instance: I18nExtension): string;
    static unregisterInstance(id: string): void;
    private static translatableInstances;
    private static i18nMessages;
    private static valueMatcher;
    private static messageTester;
    private hasI18nMsg;
    private id;
    init(expression: string): string;
    onValueChange(value: string): string;
    onDestroy(): void;
}