import * as i0 from "@angular/core";
export declare class UtilService {
    uniqueId(length?: number): string;
    getTimeSpentText(pdfPlayerStartTime: any): string;
    getKeyValue(keys: any): any;
    getMultiselectScore(options: any, responseDeclaration: any, isShuffleQuestions: any, outcomeDeclaration: any): any;
    hasDuplicates(selectedOptions: any, option: any): any;
    getQuestionType(questions: any, currentIndex: any): any;
    canGo(progressBarClass: any): boolean;
    sumObjectsByKey(...objects: any[]): any;
    scrollParentToChild(parent: HTMLElement, child: HTMLElement): void;
    updateSourceOfVideoElement(baseUrl: string, media: any[], identifier: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UtilService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UtilService>;
}