import { Subject } from 'rxjs';
declare type TranslationItem = {
    lang: string;
    title: string;
    content: string;
};
export declare class LetterTranslationsService {
    protected changeEvent: Subject<{
        type: "load" | "remove" | "add" | "change";
        data: TranslationItem[];
    }>;
    readonly onChange: import("rxjs").Observable<{
        type: "load" | "remove" | "add" | "change";
        data: TranslationItem[];
    }>;
    _origin: TranslationItem[];
    _list: Array<TranslationItem>;
    changed: boolean;
    list: Array<TranslationItem>;
    constructor();
    load(list: TranslationItem[]): void;
    protected hasChanged(): boolean;
}
export {};