import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { Observable } from 'rxjs';
import { AuthService } from '@schoolbelle/api/auth';
import { GroupService } from '@schoolbelle/api/group';
import { LetterTargetService } from '@schoolbelle/api/letter-target';
export declare class SelectLetterTargetsGuard implements CanActivate {
    private auth;
    private group;
    private target;
    constructor(auth: AuthService, group: GroupService, target: LetterTargetService);
    canActivate(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean;
}