import { PipeTransform } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class DurationToStringPipe implements PipeTransform {
    private translate;
    durationToString(duration: number): string;
    constructor(translate: TranslateService);
    transform(duration: number): Observable<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<DurationToStringPipe, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<DurationToStringPipe, "durationToString", false>;
}